Mouse cursor disappears in some programs

Hi!
Although I have used Ratpoison only for a short time I have to admit 
that I quite like it. Everything works fine except there is one glitch 
and I hope that you can help me fix it.
When I launch programs like Deluge and Liferea (and some other) my mouse 
cursor disappears. I can highlight, select and click on things but only 
blindly. When I press Ctrl-T the mouse cursor shows up (as a box instead 
of the default appearance of course) but if I cancel this mode it again 
disappears. In other programs, e.g. Firefox, the mouse cursor shows up 
fine and does not disappear. But when I am presented with a file 
download location selection window in Firefox the mouse cursor again 
disappears.
I have searched on Google for a solution for this problem but could not 
find any relevant information. The Ratpoison IRC channel was fairly 
quiet on this problem (but I have to admit that maybe I didn't stay 
there long enough).
I doubt that this has anything to do with my .ratpoisonrc because this 
problem exists even without a .ratpoisonrc present.
If any more information is needed I'll be happy to supply it.

Best regards,
Sergey