Answered
I have an original PDF file and one or more single page PDF files to replace pages in the original . The resulting file has random missing characters. All files use the same fonts, and they are embedded (subset). I have verified that they are actually embedded. I need to use subsetting because the resulting file is for a website.
Preflight of the resulting file shows missing glyphs, which are the characters missing.
I have been struggling with this for a while, and found some references to the same problem, but no solutions.
Any ideas???
Sorry, this is known behavior for earlier versions of Acrobat. Merging two files that contain a different subset of the same font can lead to missing or swapped characters. Older PDF applications can suffer from this.
I've had some luck with un-embedding & re-embedding the fonts, but there is no 100% fix.
Kelly McCathran
Adobe Community Expert
Certified Technical Trainer+