intrr found a small leak in my merge function, turns out I didn't steal enough code from the other functions ;) fix: Index: source/blender/src/edit.c =================================================================== RCS file: /cvsroot/bf-blender/blender/source/blender/src/edit.c,v retrieving revision 1.11 diff -r1.11 edit.c 1045a1046,1047 > MEM_freeN(transvmain); > transvmain= 0; Roel