Since it's now been in operation for a few days:
When nodes are deleted they have this (or similar) displayed:
Server Error (Error Id 1811804)!
An error has occured. Please contact the site administrator
with the Error Id. Thank you. Reason: Need I explain?
Not a critical bug, but it looks annoying. I'm betting it
won't be hard to tweak.
Another thing which seems somewhat 'broken' is when there
are replies to a deleted node and you want to access the
thread. Just so that it can be made easier to view all
the replies at once (which is the reason I customarily
go to the root node), it might be nice for the node to
still exist, but just be devoid of content.