Odd glyph highlighting

I saved a .glyphs file and quit Glyphs. The next time I launched the application and opened up the saved file, all glyphs now have rectangular overlapping highlights in edit view. Screenshot here: http://jesserewing.com/i/2011/highlighted_glyph.gif

Functionality does not seem to have been affected, but I can’t seem to get rid of the highlights. Any suggestions?

Thanks,
Jesse

There is something wrong with the alignment zones. Please have a look at the Font Info > Master settings.
The second number in the alignment zone list should not be bigger than 40 units. It shows the size of the zone, not the ending position.
it should look like this:

Thanks, Georg, I’ll take a look.