In a blog post,
This time of year there are lots of new iPhone owners, and not everybody knows that accepting new iOS updates is the surest way to lose your jailbreak and/or unlock. While those of you who have Cydia or TinyUmbrella backups of your FW hashes will always be able to get back to 4.0.1 if you make this mistake, this doesn’t hold for unlockers. There’s currently no known way to revert your baseband — if you update your baseband (more…)

Apple ’s UK site has also been updated to say that iOS 4.1 will be available on
while Apple ‘s US site continues to say “Coming Soon”.
To recap, iOS 4.1 will include the following new features and fixes:
High Dynamic Range (HDR) photos: Steve Jobs explained that HDR photos are created using 3 photos taken in rapid succession: one normal, one under-exposed, and one over-exposed. The photos are then combined using some pretty sophisticated algorithms (more…)

According to the release notes, iTunes 9.2 includes the following new features and improvements:
Sync with iPhone 4 to enjoy your favorite music, movies, TV shows, books and more on-the-go
Sync and read books with iPhone or iPod touch with iOS 4 and iBooks 1.1
Organize and sync PDF documents as books. Read PDFs with iBooks 1.1 on iPad and any iPhone or iPod touch with iOS 4
) are recommending users to avoid installing iTunes 9.2 if they want (more…)