I'm using Ubuntu 12.10 with cinnamon 1.6.7 and libreoffice
When launching a program of the suite in some reproducible cases no icon or the wrong icon is displayed in the taskbar.
Running a .doc document with writer the icon of impress is displayed.
Running a .xls document with calc the icon of writer is displayed.
Sometimes there is also no icon at all.

Any help is appreciated because this is really confusing.