I can't reproduce this steadily, but I have had it occur twice in the last five minutes, in the same area of the UI.

Basically, I get an error 500 with an indication that there is something bad with the software license validation.

Steps to repro (which may or may not work)

1. Navigate to $system > RHQ Server, JBossAS 4.2.1.GA default (0.0.0.0:2099)
2. Visit Inventory for RHQ server
3. Click edit to try and modify some of the connection properties.  
4. Make a change, perhaps invalid, to a given field.  Examples of ones I used that worked:
* Binding Address   -   0.0.0.0xxxxxxxxxxxxxxxxx ; submit
* Start Script - mark the checkbox, unmark (Resulting in blank field); submit
5. View results.

Expected results:
Nothing out of the ordinary -- perhaps a validation error, but nothing /weird/.

Current results:

Very occasional error 500 talking about bad license.  I was not able to repeat with either of the above examples, but it did happen with both, within 5 minutes of each other.

See attached.