call to add_numbut() asks for a NULL tooltip. --aphex ============================================================ RCS file: /cvs01/blender/source/blender/src/toolbox.c,v retrieving revision 1.4 diff -r1.4 toolbox.c 1356c1356,1360 < if(tip) strcpy(numbuts[nr].tip, tip); --- > if(tip) > strcpy(numbuts[nr].tip, tip); > else > strcpy(numbuts[nr].tip, ""); >