Hortus compiled and summarized the list of current PTR issues, which is an update to this thread on reported PTR issues.

Confirmed issues include the notorious Error 132 affecting Athlon users, the eventual fix for the orc shoulder size bug, the recently announced inclusion of in-game voice chat, and the reminder that Zul'Aman and guild banks will be coming in a later content patch rather than this one.

That crash that prevents you from playing? It's not just you. Maybe you're not crazy.

Finally, Hortus gives us some nice suggestions on how to not have your post deleted, which is especially handy considering the conspiracy theories that always are flying around the PTR forums:

Deleted Posts
If your post was deleted it was for a reason, and re-posting about it is against the forum rules, repeatedly doing so will result in a vacation from the forums.
Some of the most common reasons for posts to be deleted are:
-Duplicate posts
-Questions that are already answered in the stickies or other blue posts.
-Off-Topic posts
-Offensive, combative or otherwise inappropriate posts
-General WoW suggestions or feedback not regarding the current PTR changes
-Pre-made complaints, or requests