Unity thinks I'm running Minefield 3.5 instead of Firefox

[Joe_CoT]

For some reason this morning Unity decided that instead of running Firefox 16, I'm actually running Minefield 3.5. If I click the Firefox icon, it loads firefox, but the launcher doesn't change to indicate that firefox is open, and instead has a launcher for Minefield 3.5.

Here's a screenshot for an example:
http://i.imgur.com/DEg7i.png

I looked and I don't appear to have minefield installed. There was a menu entry for minefield that was disabled, and I deleted it. Still the same, after restarts.

Halp?

[tuberculo]

Same problem here. It started just after an update.

[tuberculo]

Solved. In the folder ~/.local/share/applications there was file named firefox-3.5.desktop. Just deleted it and now the icons are ok.