1) You can fly but you cannot go to another room so you can be easily hexxed (?) with.

2) You can roll but can't roll out of the room

3) Hermit cannot escape this, done this with Genevieve. (Thanks!)

4) The targetted warrior cannot tackle you out in any way.

5) Cannot teleport out.

EDIT:
To escape Perfectfifth, you can

1) Eat Faeleaf to have sixthsense up (easiest thing to do)

2) Gust the bard out of the room.

3) Let a warrior tackle the bard out. (the one not Targetted)

Next Stop: Ghosting and Demesne Centers

More facts:

6) If left unchecked, Bard can hold on 2 or more people with Perfectfifth in the same room unless taken cared off.

7) Yevah told me when I move out of the room and immediately come back when he hasn't move out of the room yet, the Perfectfifth is still in play.

And does burrowing work?

Okay, updates.

The Mage/Druids ability to move to the center of their demesne cannot break perfectfifth.

Burrowing... still need to look for volunteers especially ghosting and probably summoning someone out.

8) Instruments don't kill people. Perfect Fifth kills people.

9) Perfect Fifth is the reason Kethuru stays behind the seals.

Oh wait - Not that kind of fact?

Starleaper gets you out of it.

Also test shadowdance flight. And gusting yourself out as well.

I wish I'd read this post earlier. I had no idea what skill you had used or how to get out of it in Tosha, heh. Center should work through it though :|, lame.

Anyone test mount jump?

Eating faeleaf won't cure it. Eating faeleaf allows you to leave the room if not otherwise hindered. If you lose deafness again, you'll still be stuck in the room.

Just thought I'd add that, as some won't realise.