After updating to iOS 5.1 yesterday, I noticed that my bookmarks weren’t syncing.
I noticed that other people were posting about Safari Bookmarks not Syncing (example here).
I found the best solution to fix the bookmar syncing issues here.
In a nutshell:
1) On your Mac, go to system settings, select iCloud, and disable bookmark syncing.
2) On your iPhone or iPad, do the same. Confirm that you want to delete all bookmarks on your mobile device.
3) Wait 3-5 minutes. Then go to your Mac and enable Bookmark syncing via iCloud again. (Confirm merging of bookmarks if asked)
4) Wait 3-5 minutes, then go to your mobile device and enable Safari bookmark syncing via iCloud as well.
This should fix any issues.








