[OverZealous]

I can confirm the same error and error message in the log. I also get the I.S. error when browsing using my iPod Touch (using the Mobile view). I also upgraded from 5.0.2 -> 5.0.4 recently.

Update: I shut down the server, deleted most of the log files (I had a ton of them), and restarted. I also had deleted everything out of /jetty/work/ earlier. For right now, the HTML client appears to be working. However, when I go to the Calender section of the mobile version, I still get the Internal Server error.

This may not be related, the Mobile version is not currently showing the folder hierarchy properly - it is a flat list instead. The built in Mail.app on the iPod is also giving weird "cannot connect" errors, even though it works about 50% of the time, so this is quite frustrating, as you can guess. (I probably should put these complaints in a different thread.)