ShellAck

In the meantime I got some more details about this issue (yes, I admit, that I used GTK-clients in KDE using appropriate schemes):

• Starting Firefox with a QT-related GTK scheme will break the VMWare Server Console, carping Glib::FileError.
• Setting VMWARE_USE_SHIPPED_GTK=yes in the environment before starting Firefox will fix the problem, the VMWare plugin will not use my GTK setting.
• Using another GTK scheme (not QT or QTCurve) will also solve this issue.