Popular custom firmware JF has been updated with the new features to be found in the official G1 RC-33 upgrade.  JFv1.41-RC33, the handiwork of JesusFreke and friends, adds multitouch, auto-rotate, and more straightforward access to the underlying Linux OS than the standard G1 has.

The custom firmware does not, though, include one of RC-33′s key features: the radio update.  This is left as a separate update, so as to avoid multiple flashes of the radio every time the v1.41 update is run.  While there’s no definite word from T-Mobile as to what exactly the RC-33 radio update addresses, it’s hoped that it will have a positive influence on battery life.

Remember, if you’ve got a question about JFv1.41-RC33 or any custom firmware, you can raise it in the Android Community forums.  As ever, you can brick your cellphone if you make a mistake updating it, so it’s better to have all the details before rather than after.

Fixes:

Comcast fails to download more than 1 email
Symptom(s): No error message but it stays on “Load More Messages” without ever pulling another email.
“Messages” Stability Issue
Symptom(s): When trying to send a message or exit the “Messaging” application you receive a pop up message that reads “Sorry! Activity Messaging (in application Messaging) is not responding. Force Close Wait”
WiFi forcing a logout of IM
Symptom(s): While using the IM clients on the G1 if you turn on or off WiFi the sessions are terminated and you will need to sign back in.
No reminders for calendar items.
Symptom(s): Missing appointments due to the lack of a reminder.
G1 hanging at the G1 Screen
Symptom(s): A small number of G1 devices hanging at the G1 screen during the initial power up
New Features:

Support “Check For Upgrades” (New feature to check for system upgrades)
Voice Search (New Google feature for searching)
Ability to save pictures recieved as MMS
Ability to report offensive comments in the Market as SPAM

[via WebNetta]