Hmm, that didnt seem to do the trick The plist looks odd as well... This is what I see: http://cl.ly/2T0n1h0w1o3Q0A0m2R15
Thank you for your suggestion. If you have any other ideas, I'd be very appreciative! Thank you!
You'll have to use the terminal/command line and follow these steps:
Make sure Messages is not running.
From the terminal (command line) convert the plist file to xml with the following command:
plutil -convert xml1 ~/Library/Preferences/com.apple.iChat.plist
Next edit the file with TextEdit by running this from the terminal:
open -e ~/Library/Preferences/com.apple.iChat.plist
after the lines that read:
Finally convert the plist file back to binary format with the following command:
plutil -convert binary1 ~/Library/Preferences/com.apple.iChat.plist
Open Messages and test...