> Most of those issues are with Unity not MonoDevelop, aren't they?

True, but I consider them as one platform (Unity and its customized MonoDevelop, specifically).

  > Text search works fine for me though! I've never had a problem with it.

It's a weird bug that was probably unique to the 3.3 version.

  > My worst problem with it actually is just stability, but I've never
  > lost work with it and it restarts pretty quickly.

I get a lot of freezes and crashes too, but to its credit MonoDevelop definitely has a very robust autosave.

  > What are you working on, out of interest? (If you're allowed to say!) :)

3-d mapping (à la Google Earth, but with different goals).