Welocme to the Forums!
Lots of upsdide to 4.5, including video camera functionality and html e-mail. Browse the thread below to see some other advantages. Upgrading the OS may solve your SureType issue as well, but if you decide not to upgrade right now, try pulling the battery for 10-15 seconds, that may clear it.
http://www.blackberryforums.com/gene...languages.html