Answers to your questions: Is there any pattern to the fonts that fail? None that I can see. The only thing they have in common is the type of crash. All crashes are tagged with a "divide by zero" error. Are they all the same format? Yes. TrueType. Are they all stored the same way or in similar locations? They are stored alphabetically - one folder for each letter; ie all fonts beginning with the letter "A" are in the "A" folder, etc. Do they work in applications? All applications or only Adobe or only non-Adobe? These fonts crash all apps that try to display text. However, I can open them with most of my diagnostic type apps. What are the fonts' sources - downloads from free sites? Purchases from name foundries (Adobe, Linotype, Hoefler, etc.)? Old CD's from fly-by-night companies like WSI and Southern Software? My fonts come from everywhere - purchase, CD graphics collections, downloads. But I am unable to tell where a particular font came from. Do you have a font editor such as FontLab or Glyphs? If so, have you tried simply opening a font in the editor and re-generating it? (This often works for older fonts in Windows, where current Windows isn't as fault-tolerant as previous versions) I have Fontographer. With it I am able to open my test font and display all of its characters. But when I "generate fonts" with it, the resulting font file crashes my system in the same way as the original font does. Gary
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