i have the pearl 9105 (uk version) only vodaphone uk has released os6 OFFICIALLY!
the problem is os6 os the pearl creates a masive memorie leak
i updated it by deleteing the vendor.xml (im on 02-uk) and i deleted social feeds
and all the other stuff i did not use,and like 1hr of browser use it went from
70'ish MB to 30MB no apps or internet would work,only got 4 apps (appworld,bbm,foursquare,facebook) but i dont use the app for facebook
i just dont think the phone is powerfull enough to run os6,and i think RIM/Carriers know that
and i think thats why they realease them on os5 cos it runs better