Blackberry 8220

I'm running the latest OS for my Blackberry: 4.6.0.174/4.6.0.309. For the first time, it's not working perfectly. I'm getting some strange behaviour, mostly to do with the profiles. It changes ringer randomly, even though it tells me it's using a specified ringtone, and it plays when I'm in the profile settings page.

It doesn't seem to change profile every time either, this problem occurs more frequently if charging the phone. It appears to change the profile settings, but it doesn't change the icon, or which profile is acutally selected, just the behaviour of the phone.

It's kind of annoying, especially when I've set the phone to vibrate, and instead my Crystal Maze ringtone kicks in!