There are some likes and dislikes to BBM 5.0, and I like that RIM tries to address these issues, so with BBM 5.0.0.55 they addressed the issue with the pictures, and cleaned up the status area and organized the groups a little. Its a simple upgrade to your current 33 version but I recommend that you do a full back up before doing any software modifications:

Improvements:

• Picture Preview, you don’t have to download to see the pictures now
• Cleaned up text in your status and chat previews
• Cleans up groups as well

Link: Download BBM 5.0.0.55