Tonight, I've had a couple of wiki edits receive an error message upon submission. The red error bar appears at the top of the page, and the two submission options (submit and cancel) are greyed out.
The edits appear to be saved in the system somewhere. In my wiki history, they exist as "Pending" edits (but I don't really ever see those anymore because I have plenty of points).
Here's my wiki history: http://www.giantbomb.com/profile/homeslice/wiki-submissions/
As you can see, edits 51321 and 51296 have Pending status.
I'm not sure whether that means they will eventually be approved by a moderator or what.
I'm on a MacBook Pro and use Chrome, in case that's helpful.