Since upgrading to the newest viewer I've experienced the following weirdness. All of these went away after restarting, but it's still not a good sign.
1) A large white square appeared in the sky directly above me. It would slowly fade in and out. It could not be gotten closer to, and only I could see it.
2) I opened a script in a teleport ball to change the coordinates and found myself looking at a script written in what appeared to be Hebrew. It might have been Arabic, it was too small to really tell for sure. ALL of my scripts were like this until I restarted.
3) My "floating keyboard" (the type that appears when you type) would not display the proper texture for me until I restarted. It looked white with a pink border. This occured in the same session as #2.
This was the first time any of these occured since I started 30 days ago so I can only assume it's the latest update.