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Created attachment 801150 [details]
example .xssession-errors output

Description of problem:
After installation of nspluginwrapper together with acroread-plugin and flash-plugin (supplementary channel), starting firefox leads to my .xsession-errors file being flooded with error messages like:
(npviewer.bin:3080): Gtk-WARNING **: Unable to locate theme engine in module_path: "clearlooks"
Gdk-ERROR **: The program 'npviewer.bin' received an X Window System error
*** NSPlugin Wrapper *** ERROR: NPP_HandleEvent() wait for reply: Connection closed
(npviewer.bin:3719): Gdk-WARNING **: XID collision, trouble ahead

For complete output refer to attachment.

Version-Release number of selected component (if applicable):
1.4.4-1.el6_3.x86_64
1.4.4-1.el6_3.i686

How reproducible:
always

Steps to Reproduce:
1. install nspluginwrapper and Adobe plugins from RH channels
2. start firefox
3. observe messages in ~/.xsession-errors

Actual results:
see attachment

Expected results:
no errors

Additional info:

There's nothing we can do with it.