more general: strategy against errors with gtk + threads

[Felix Kater <f kater2 gmx net>]

Hi,

in my last program I use threads more extensivly than before. From time
to time it crashes with gtk errors. Now I wonder if my strategy of
avoiding gtk errors in a multi threaded environment is suitable:

Up to now I tried to narrow all changes to gtk widgets (renaming labels,
draw into drawables etc.) to one single function, which is running in
idle time. It checks "change-booleans" for each widget and reacts on
that (renames labels etc.).

Is this the right way to do?
And what is actually - in general - causing the errors? 

Thanks,
 Felix