Uncaught exception:
 

javalang.illegalArgumentException

This is what I get on my 7100t when I try to change the theme.....I just upgraded to 4.1

Also, the new themes I create are not there either......

Uncaught Exception
 

I have the same issue on my work 7290. My mail to the BB suddenly stopped yesterday afternoon and when I check my email options and specifically email filters I get this error: Uncaught exception:java.lang.illegalArgumentException.

tried refreshing and resent the default policy, switch it off and on. No help and I'm up to date on version software.

I had this problem when I tried to use 4.1 from Hong Kong. However then I went and downloaded the Cable And Wireless Version, and it fixed everything for me.

Here is the link for that:

https://www.blackberry.com/Downloads...81A90F89D99BCD

And here is the link on how to install it:

http://www.pinstack.com/blackberryfo...read.php?t=929

As for the themes not working, I had this same problem. I would download them and do a hard reset and they didn't work, SO I was messing around one day and I did this and they worked:

Options
Advanced Options
Applications
Then find the one that you are wanting to activate, example mine on the list was: Com_plazmic_theme_......
Click on that and then click "Edit permissions", then change everything to ALLOW, then do a hard reset, and all of them will be there.

Hope this helps.