I have also upgraded the Desktop Manager to Version 4.7
This NEW OS is fast and Stable...no problems yet found.
Some New Things to note (may be I am noticing it for the first time because I upgraded to this after a long time from 8100M_PBr4[1].5.0_rel81_PL2.7.0.68_A4.5.0.55):
1) Application MDS Control Center.
2) Blackberry Messenger is back again.
3) Blackberry Maps is back
4) Application "Documents to Go" where you can open MsWord and PPT files stored on media card.
5) Tasks and Memo Pad sync from Outlook is back.
6) Something new in Device Options... Options -> Advance Options -> MDS activation
7) I noticed "attach file" in compose email.
Overall verdict: Its good to have this New OS. Its fast, stable no issues encountered as yet
I am happy with it.