I received many bug reports from Hero owners about force closing on application start.
Apparently this bug related to the unusual caching of installed application. In every bug report I collect some info about version and phone model.
App Version: 0.6.4
This info appears in versions newer 0.7.3, however every bug report that I get from Heros application version is showed as 0.6.4. This means originally installed application so strangely cached that only part of application gets updated.
Many people report that after phone reboot, application gets corrupted again. I feel for Hero owners, but the only solution for this problem is coming phone update from manufacturers (HTC/Sprint/etc). I have an idea how to fix F/C when GDocs starts, but I won't guarantee that Hero update mechanism messes up something else.