Bug: Preview doesn't update after reverting file

Hi there!

Pretty much as described in the title, when the file is reverted to its last saved state, the preview won’t update anymore (when you type something or change layers). You can force update it by for example blurring it a bit, but then it is frozen once again.

Glyphs 1.4.3 (562), OS 10.6.8.


Will fix this.