gdk_threads_enter/leave not enough?

[Felix Kater <f kater2 gmx net>]

Hi,

my applications crash if I wrap gtk/gdk function calls from threads
into gdk_threads_enter/leave only.

Additionally, I have to use "refresh flags" which are set by the
threads and checked inside an idle function--which then calls the
gtk/gdk functions (and resets the flags).

Is that a known behaviour, and, if so why is gdk_threads_enter/leave
not enough?

Felix