Same problem here... only powering down doesn't help.

I've run Canola Cleanup and re-installed... it works until I re-download a theme or Canola Tuning and it I only get as far as the "local drive out of disk space" error.

As far as I can tell this started on it's own... I had not done any updates, I had space available, I hadn't installed anything, and I WAS running an old version of OS2008. Updating the OS didn't help, obviously.

Too bad... Canola had been pretty stable. Now it seems impossible to clean out the problem even with Cleanup and re-install.

-P.