Does anyone recognise this? I'm fairly sure it's a brand new "feature" perhaps from recent patches to app/ ? If no-one recognises this I will file it through the normal channels, but since it looks like a fresh regression it seemed easiest to ask first. 1. Create new _greyscale_ image 2. Use a nice colorful pepper brush (you know, the demo color brush) 3. Scribble all over the image, off the edges... [This being a memory scribble bug it might not work first time] 4. Bang. (relevant section of stacktrace -basically its a memory scribble) #4 0x4028ec68 in __restore () #5 0x402c9fba in __libc_free (mem=0x873dd78) at malloc.c:3023 #6 0x4018439d in g_free (mem=0x873dd78) at gmem.c:411 #7 0x814a554 in tile_alloc () #8 0x814a6d0 in tile_detach () #9 0x814aaba in tile_manager_destroy () #10 0x81567d2 in undo_push_image_mod () #11 0x8155a3f in transform_tool_show_grid () #12 0x8155ab0 in transform_tool_show_grid () #13 0x8155b56 in transform_tool_show_grid () #14 0x8156213 in undo_push_group_start () #15 0x81134b7 in paint_core_finish () #16 0x8112477 in paint_core_button_release () #17 0x80aaa57 in gdisplay_canvas_events () Nick.