Corrupt update and addon windows in minefield

Is this a known problem? I'm using foxyproxy on the latest nightly builds of minefield (currently 3.2a1pre) and things work fine at first. However eventually the update and addons windows will become corrupted (see http://drop.io/mibwp7m). This possibly occurs after installing a minefield update and restarting, but I've not confirmed this yet.

I can get rid of this corruption by manually removing the foxyproxy extension folder from my profile. I see the same error starting from a new profile.

Hi, I've never encountered

Hi,

I've never encountered this bug, but you are running an alpha of Firefox so i'm not surprised. What FoxyProxy version are you using?

Eric

2.8.11, although though the

2.8.11, although though the problem isn't new to this version.
After deleting & reinstalling foxyproxy yesterday to recover from it, I've since done another nightly update without it reoccurring so what triggers it remains a mystery to me :(