A couple notes:
1) I think I was getting some of this behavior when using 3.2, but I'm not 100% sure (I don't usually trash things)
2) Behavior stays even when plugins are disabled
3) I'm using the WP Multi-Network plugin to manage multiple networks, if that's relevant.
In any case, when I am on a blog admin's edit page and I click "Trash" under a post, instead of being redirected to http://example.org/blog/wp-admin/edit.php or wherever it's supposed to go, it redirects to http://example.org/?trashed=1&ids=35 (or whatever the id of the post is). A similar thing happens when I untrash.
It successfully trashes or untrashes the item, it just seems like it is redirecting incorrectly. I do have ScriptNo running in Chrome, but it says everything in trusted. All other options on the edit page appear to work. Selecting "Move to Trash" when editing the post itself results in the same behavior.
A similar thing also happens when I delete an attachment in the post's media manager.
I've gone through the code and the database seeing if I can find any clues as to why this is happening, and I can't seem to find anything. I don't know if it's the Multi-Network plugin not playing nice with recent versions of WordPress or what the problem is. It's not a show stopper problem but it is really annoying.