confirmed by MN.
# Today's iTunes 10.2 is safe for JBers (syncs fine, doesn't break DFU JB tools or afc2, allows shift/opt-Restore, etc) 3:47 PM Mar 2nd via web
Broke mine using the update in iTunes kept saying files missing re-install!
I got round it by uninstalling it compleatly then using the link off the macroumours home page!
Also restart after install as it breaks syncing!
What a head ache!!!
From MN's twitter a bit ago
"Today's 10.2.1 iTunes is safe for JB+UL, like last week's 10.2 (fast release!) Even keeps new http://is.gd/qv6wpv feature"