xsession error log

I've noticed many errors in my .xsession-error.log. The main culprit is: X Error: BadWindow (invalid Window parameter) 3 Major opcode: 19 Minor opcode: 0 Resource id: 0x3600134 The opcode is usually 19 or 20. The errors are mainly caused from gtk applications written in gtkdialog with many other entries being from tdeinit. [tdeinit] Got EXT_EXEC 'kfmclient' from launcher. [tdeinit] PID 4739 terminated. At the moment i am softlinking .xsession-errors to /dev/null in my environment. An ugly fix. The log fills quite fast. Is this just bad coding of gtk apps? Kind Regards, Jay