Index: /anuga_core/source/anuga/geometry/quad.py
===================================================================
--- /anuga_core/source/anuga/geometry/quad.py	(revision 7711)
+++ /anuga_core/source/anuga/geometry/quad.py	(revision 7712)
@@ -63,5 +63,4 @@
         # process list items sequentially
         if type(new_leaf)==type(list()):
-            ret_val = []
             for leaf in new_leaf:
                 self._insert(leaf)
Index: /anuga_core/source/anuga/shallow_water/test_shallow_water_domain.py
===================================================================
--- /anuga_core/source/anuga/shallow_water/test_shallow_water_domain.py	(revision 7711)
+++ /anuga_core/source/anuga/shallow_water/test_shallow_water_domain.py	(revision 7712)
@@ -1813,14 +1813,10 @@
 
         #Reference (nautilus 26/6/2008)
-        
-        G0 = [-0.20000000000000001, -0.20000000000000001, -0.20000000000000001, -0.1958465301767274, -0.19059602372752493, -0.18448466250700923, -0.16979321333876071, -0.15976372740651074, -0.1575649333345176, -0.15710373731900584, -0.1530922283220747, -0.18836084336565725, -0.19921529311644628, -0.19923451799698919, -0.19923795414410964, -0.19923178806924047, -0.19925157557666154, -0.19930747801697429, -0.1993266428576112, -0.19932004930281799, -0.19929691326931867, -0.19926285267313795, -0.19916645449780995, -0.1988942593296438, -0.19900620256621993, -0.19914327423060865, -0.19918708440899577, -0.19921557252449132, -0.1992404368022069, -0.19925070370697717, -0.19925975477892274, -0.1992671090445659, -0.19927254203777162, -0.19927631910959256, -0.19927843552031504, -0.19927880339239365, -0.19927763204453783, -0.19927545249577633, -0.19927289590622824, -0.19927076261495152, -0.19926974334736983, -0.19927002562760332, -0.19927138236272213, -0.1992734501064522, -0.19927573251318192, -0.19927778936001547, -0.1992793776883893, -0.19928040577720926, -0.19928092586206753, -0.19928110982948721, -0.19928118887248453]
-
-        G1 = [-0.29999999999999993, -0.29999999999999993, -0.29139135018319512, -0.27257394456094503, -0.24141437432643265, -0.22089173942479151, -0.20796171092975532, -0.19874580192293825, -0.19014580508752857, -0.18421165368665365, -0.18020808282748838, -0.17518824759550247, -0.16436633464497749, -0.18714479115225544, -0.2045242886738807, -0.21011244240826329, -0.21151316017424124, -0.21048112933621732, -0.20772920477355789, -0.20489184334204144, -0.20286043930678221, -0.20094305756540246, -0.19948172752345467, -0.19886725178309209, -0.1986680808256765, -0.19860718133373548, -0.19862076543539733, -0.19888949069732539, -0.19932190310819023, -0.19982482967777454, -0.20036045468470615, -0.20064263130562704, -0.2007255389410077, -0.20068815669152493, -0.20057471332984647, -0.20042203940851802, -0.20026779013499779, -0.20015995671464712, -0.2000684005446525, -0.20001486753189174, -0.20000743467898013, -0.20003739771775905, -0.20008784600912621, -0.20013758305093884, -0.20017277554845025, -0.20018629233766885, -0.20018106288462198, -0.20016648079299326, -0.20015155958426531, -0.20014259747382254, -0.20014096648362509]
-        
-        
-        G2 = [-0.40000000000000002, -0.38885199453206343, -0.33425057028323962, -0.30154253721772117, -0.27624597383474103, -0.26037811196890087, -0.24415404585285019, -0.22941383121091052, -0.21613496492144549, -0.20418199946908885, -0.19506212965221825, -0.18851924999737435, -0.18271143344718843, -0.16910750701722474, -0.17963775224176018, -0.19442870510406052, -0.20164216917300118, -0.20467219452758528, -0.20608246104917802, -0.20640259931640445, -0.2054749739152594, -0.20380549124050265, -0.20227296931678532, -0.20095834856297176, -0.20000430919304379, -0.19946673053844086, -0.1990733499211611, -0.19882136174363013, -0.19877442300323914, -0.19905182154377868, -0.19943266521643804, -0.19988524183849191, -0.20018905307631765, -0.20031895675727809, -0.20033991149804931, -0.20031574232920274, -0.20027004750680638, -0.20020472427796293, -0.20013382447039607, -0.2000635018536408, -0.20001515436367642, -0.19998427691514989, -0.19997263083178107, -0.19998545383896535, -0.20000134502238734, -0.2000127243362736, -0.20001564474711939, -0.20001267360809977, -0.20002707579781318, -0.20004087961702843, -0.20004212947389177]
-        
-        G3 = [-0.45000000000000001, -0.38058172993544187, -0.33756059941741273, -0.31015371357441396, -0.29214769368562965, -0.27545447937118606, -0.25871585649808154, -0.24254276680581988, -0.22758633129006092, -0.21417276895743134, -0.20237184768790789, -0.19369491041576814, -0.18721625333717057, -0.1794243868465818, -0.17052113574042196, -0.18534300640363346, -0.19601184621026671, -0.20185028431829469, -0.20476187496918136, -0.20602933256960082, -0.20598569228739247, -0.20492643756666848, -0.20339695828762758, -0.20196440373022595, -0.20070304052919338, -0.19986227854052355, -0.19933020476408528, -0.19898034831018035, -0.19878317651286193, -0.19886879323961787, -0.19915860801206181, -0.19953675278099042, -0.19992828019602107, -0.20015957043092364, -0.20025268671087426, -0.20028559516444974, -0.20027084877341045, -0.20022991487243985, -0.20016234295579871, -0.20009131445092507, -0.20003149397006523, -0.19998473356473795, -0.19996011913447218, -0.19995647168667186, -0.19996526209120422, -0.19996600297827097, -0.19997268800221216, -0.19998682275066659, -0.20000372259781876, -0.20001628681983963, -0.2000173314086407]
-        
+
+        G0 = [-0.20000000000000001, -0.20000000000000001, -0.20000000000000001, -0.19729755264559332, -0.18143006781428656, -0.17264603126739803, -0.16490767093739186, -0.15580226478343825, -0.15341783464373857, -0.14986976789238646, -0.1483294354194323, -0.19385112169384708, -0.19907249891161938, -0.19911053885072424, -0.19913592111915288, -0.1991524040791994, -0.19916445999802629, -0.19917790655716, -0.19919280664859376, -0.19920527965237472, -0.19921381524768964, -0.1992178338453264, -0.19921637002152079, -0.19920783637167225, -0.19921088191840772, -0.19919037392917549, -0.19918812396862254, -0.19918939056535054, -0.19919336800395021, -0.19919832209289323, -0.19920329732763048, -0.19920824490004829, -0.19921301385072837, -0.19921748460975705, -0.1992215655528298, -0.19922516461276893, -0.19922820250665138, -0.19923065047412888, -0.19923254166903823, -0.1992339741831877, -0.19923510970454786, -0.19923612584283332, -0.19923716297385921, -0.199238301846201, -0.19923956605537632, -0.19924092368339749, -0.19924231511786381, -0.19924367609907154, -0.19924495328100339, -0.19924611576332413, -0.19924716014245455]
+        G1 = [-0.29999999999999993, -0.29999999999999993, -0.29312012778165086, -0.26736324399674027, -0.23794021958953263, -0.21878933349240881, -0.2063216250007715, -0.19630760483269205, -0.18778429435995911, -0.18241377240055098, -0.17860448861463396, -0.17352695896444634, -0.16449192186501546, -0.18953645096562932, -0.20557835913635514, -0.21071182844586539, -0.21191011610076083, -0.21068538990761979, -0.20737339293005266, -0.20407505794124087, -0.20190406545920248, -0.19987295968833538, -0.19832486432402194, -0.19774281454937118, -0.19763203737080062, -0.19769585527535841, -0.19795493497088903, -0.19841633252351859, -0.19886909990019369, -0.19940203310127189, -0.19990812587783294, -0.20016182994265733, -0.20026318580583596, -0.20022855664242351, -0.20010463117095048, -0.199930824934102, -0.19973147245180795, -0.19957882377401115, -0.19948188719957555, -0.19944190810764481, -0.19945196574982568, -0.19949690579414533, -0.19955788251561279, -0.19961580710612042, -0.19965570581001513, -0.19966924072268322, -0.19966164565962002, -0.1996429044375452, -0.19962419292036049, -0.19961203640143024, -0.19960927744740292]
+        G2 = [-0.40000000000000002, -0.39653752812451043, -0.32890250043784469, -0.29967800724628818, -0.27572700190320054, -0.25893877811152488, -0.2422572785756886, -0.22758771043596362, -0.21433402198450011, -0.20266876405969875, -0.19393588052745447, -0.18766846928826031, -0.18182722392707523, -0.16865402349317951, -0.18110962350013771, -0.19547215504627991, -0.20229670797148233, -0.20494160396870145, -0.20614855426298931, -0.20616358034144364, -0.2050749944506553, -0.20329491765401383, -0.20174840479413605, -0.20040155802388543, -0.19945041001985703, -0.19898209259951644, -0.19868944730468457, -0.19849574784901269, -0.19855116942355155, -0.19885365879108613, -0.19925381355621719, -0.19971339601933866, -0.20000203652933318, -0.20011337898513715, -0.2001188815225943, -0.20007116187977508, -0.20000646342088527, -0.19993034594397555, -0.19985512250322437, -0.19978530424723981, -0.19973800656091345, -0.19971854873923284, -0.19972327598147538, -0.19974189986453444, -0.19976101408429672, -0.19977705650936498, -0.19978787136068635, -0.19979206946039513, -0.19978865745584601, -0.19978181317853855, -0.19977875136946421]
+        G3 = [-0.45000000000000001, -0.3906171915476076, -0.33751559765929762, -0.31026774290261511, -0.29150738729204234, -0.27397105043504921, -0.25707577524439718, -0.24089445106487939, -0.22602478966872991, -0.21275264025598517, -0.20126342031762523, -0.19293559493408963, -0.18661055808149979, -0.17800642296159738, -0.17123699584858398, -0.18645809128991342, -0.19669926266563173, -0.20218414618100938, -0.2048505364501752, -0.20599231387937839, -0.20558647909513916, -0.2045369291020529, -0.20300972871279999, -0.20156215679108602, -0.20027781267519013, -0.19947716592932677, -0.1990060810293186, -0.19869571072640099, -0.19854946127262937, -0.19871157441442233, -0.19901021995335083, -0.19941014392931206, -0.19978886669645612, -0.20000390911333427, -0.20007832370046588, -0.20009897180781114, -0.20006791850493177, -0.20001363611642112, -0.19994699922989131, -0.19987735145281954, -0.19981900700978786, -0.19978764907482763, -0.19977738345182436, -0.19977197616948861, -0.1997649033205561, -0.19976473710918075, -0.19977283294030621, -0.19978604584565826, -0.19980153142829629, -0.19981888267240014, -0.1998350491955701]
+       
         assert num.allclose(gauge_values[0], G0)
         assert num.allclose(gauge_values[1], G1)
