Not sure if this is an OS 3.0, 3G or JB issue but if you launch the Messaging app, type an SMS with errors so the dictionary can autocorrect then send. Now do the same to another contact without quitting the Messaging app. Does the dictionary autocorrect? Mine doesn't unless I quit the Messaging app and start again. Anyone else get this? Just trying to determine whether its the OS, 3G iPhone only or a jailbreak issue.