Ubuntu 10.10 errors when I change the temp files directory

Hi there!
I am unable to understand if this is an Ubuntu/Linux issue, or else Audacity. But the error displays:
The default location for Audacity temp files is /tmp/audacity-jan/.audacity_temp/ and this works fine but unfortunately there is little disk space available there.
Every time I restarted Audacity after changing the location in preferences, following error occurred:
"Audacity could not find a place to store temporary files.
Please enter an appropriate directory in the preferences dialog."
I have tried it on several locations on different partition on the same physical hard drive, but Audacity doesn’t accept these, just only default.
Is there anything else I can do to make it work?
