I have heard that the new iTunes update breaks syncing when you have a JB phone. Can anyone confirm this? I would test it, but my phone isn't JB.
I've heard that it only applies to jailbroken iPhones that run Windows. All people with Mac OSX don't seem to be having those troubles.
I used Blackra1n to jailbreak my 3GS. No problems whatsoever. Maybe it's b/c I use a Mac instead of Windows.
I've got a jailbroke 3Gs with 3.1.2, running windows xp, and i upgraded to itunes 9.1 last night. I didn't even realize that there was a sync issue, but I haven't had a single problem yet. In fact, i just synced my iPhone to check and see and no problem whatsoever... Is this an isolated issue, or am i just lucky?