This appears with fixing the bug 645316, the bug 687845, and the bug 687847 (actually the text was missed before fixing them). Such text converts into 2 overlapped texts with Type 3 fonts, one of which consists of empty charprocs, and another one does of synthezised bitmaps. Use test cases of the mentioned bugs.
The following patches fix the text duplication : HEAD : http://ghostscript.com/pipermail/gs-cvs/2005-January/005150.html GS_8_1X : http://ghostscript.com/pipermail/gs-cvs/2005-January/005149.html
Dropping the priority after a discussion with Raph in a support call.
Rather it's not a strong duplicate of the bug 687298 (because this one is about FMapType 9 (CMap), and that one is about other FMapType values, which are handled with different methods), we resolve it as duplicate because both bugs are fixed with common patches - see the bug 687298. *** This bug has been marked as a duplicate of 687298 ***