The Official List:
CityofHeroes.com > News > Known Issues
The more updated and more detailed Player-made List:
Paragon Wiki: Known Issues
Edit:
On a side note, I was just reading through the Wiki just to update myself on stuff I may have missed on the boards, and it seems there is a handful of items on the list that might be working as intended, so it's not necessarily just a list of bugs, but a list of "strange policies" also. lol
Ok, I've looked. mayhap I missed it.
Is there, where is, an official know bugs list?
I'd like to know certain things are at the very least acknowledged, and of course, be for warned so that I do not needlessly bat my head against them in frustration.