I installed 4.5 last night with no problems. The OS works great, the only drawback seems to be that when i do a battery pull, my theme resets. It doesnt change, but the folders I have with all the icons disappear and all the icons are all scattered. I searched and couldnt really find much about this, but is this one of the bugs in the 4.5 OS?
That's a known issue with the Today Plus and 4.5 OS. Simply change to a different theme. Don't be disappointed if you find some of your custom themes have banner issues; icon themes seem unaffected by this, however.