if an asset's note in UAPM contains special characters, then further notes on that particular asset cannot be created. Existing notes cannot be edited either.
If you try and collapse asset information or notes from this screen, then an error message is displayed.
If the MDB is manually updated to remove the 'greater than' or 'less than' symbols, then the issue is resolved.
I have spoked to CA who advised that disabling post validation ( validateRequest="false" ) will definitely avoid this error, however it is not recommended.
Is there a parameter that will disallow a user from saving text with "Dirty Characters" in it?