Seems to be a know upstream issue as per URL. Drag and drop of sheet tabs in Open Office Calc 3.1.1 (oocalc) crashes calc in KDE4. Reproducible: Always Steps to Reproduce: 1. Open Calc in KDE4 2. Try to drag and drop tabs 3. Sob quietly. When running from a terminal output is: QPainter::begin: Cannot paint on a null pixmap QPixmap: It is not safe to use pixmaps outside the GUI thread QPixmap: It is not safe to use pixmaps outside the GUI thread QPixmap: It is not safe to use pixmaps outside the GUI thread QPainter::begin: Cannot paint on a null pixmap X-Error: BadDrawable (invalid Pixmap or Window parameter) Major opcode: 62 (X_CopyArea) Resource ID: 0x0 Serial No: 15962 (15962) These errors are reported asynchronously,
Dragging tabs no longer crashes Calc in latest version - build 3.2.0.7
Thanks for reporting back, closing this (as 3.1.1 will be removed from the tree soonish anyway)