[ink@mtz ~]$ wmctrl -myes, i use KDE4 but build from source from KDE servers.
X Error of failed request: BadWindow (invalid Window parameter)
Major opcode of failed request: 20 (X_GetProperty)
Resource id in failed request: 0x180010c
Serial number of failed request: 11
Current serial number in output stream: 11
That command doesnt work here, does it produce a window? I build KDE from source and i use a different oxygen package to enable QT application transparency and some GUI apps refuses to run i suspect because of it, the other i know of that produce that kind of error is xine.
I suspect variable is set by log in manager(kdm,gdm) and hence may produce different results depending on what manager is in use. Do use the same manager on both of your installs?