Black bars on uv when resizing uv window?

whenever i resize the uv window, weird black bars appear all around my uvs, blocking any of the texture and being an all around nuisance.

heres what it looks like

when i resize the window, the blackness gets both bigger and smaller, so i can only edit the uvs at a very certain size of the window, otherwise the blackness distracts and bothers me.

does anyone else have this problem? i was just using blender one day and it started doing this, it didnt do it before.

I’ve seen that when zoomed way in. Also zoomed in in edit mode sometimes. 2.68. Gotta be a bug. Maybe try the latest build.