I'm getting a weird bug in b781. Sometimes, the document will become unresponsive in a certain way. I can still type, but when I try to click a heading (to fold it) nothing happens. When I look at the file in finder, I see that it is now 0 kb. Even if I select "save", the file remains empty in the finder (although I can see all the text in the FoldingText window. If I quit FoldingText, the data in the file is lost (and I must restore from Dropbox). What can I do to help track this down?