I use Frame v. 11 I've had 2 instances of text mysteriously 'disappearing' from my document: once the letter 'a' was globally removed, the 2nd time the word 'installation'. I didn't do these deletions - anyone have any experience with this?

on screen, in .pdf, elsewhere?

gaps left behind or text reflowed?

Not that knowing these details guarantees an answer, but they might help people who know more than I do :-} "Gaps instead of letters" has in the past been related to .pdf conversion, though that was some time ago.

[ps] try also PMHubert's post, a couple of entries up the forum at print pdf