Adobe Support documents of interest: Typecheck errors; Exchange freeze

From Adobe's Technical Solutions Database:

PostScript Error "typecheck" When Printing from Acrobat Reader 3.01 or Exchange 3.01: The problem only affects PostScript Level 1 printers (such Apple LaserWriter II NT). The document offers several solutions. (Thanks, Richard Darenberg.)

Error or Freeze When Starting Acrobat Exchange 3.0x in Mac OS 8.5 Adobe Acrobat Exchange will not start in Mac OS 8.5 if its Capture plug-in is installed. Instead, it or the system may freeze, or you'll receive an "unmapped memory" error. [This relates to the issue with the ScanPI, ImportPI, and OCR plug-ins, as described previously on MacFixIt.] (Thanks, Jeremy Paine.)