Hi again,

OK, the problem can be reproduced. 

I just restarted my computer and encountered the same problem. And it
could be resolved in the same way: I had to start X, then it goes away
without anything else done. I can even close X again and still have
access to my coda volume.

I know that everything worked fine with my "old" 2.4.14 kernel.

Ciao
Florian