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- Known, current PKZIP bugs/limitations:
- -------------------------------------
-
- - PKUNZIP 2.04g considers volume labels valid only if originated on a FAT
- file system, but other OSes and file systems (e.g., Amiga and OS/2 HPFS)
- support volume labels, too
-
- - PKUNZIP 2.04g can restore volume labels created by Zip 2.x but not by
- PKZIP 2.04g (OS/2 DOS box only??)
-
- - PKUNZIP 2.04g gives an error message for stored directory entries created
- under other OSes (although it creates the directory anyway), and PKZIP -vt
- does not report the directory attribute bit as being set, even if it is
-
- - PKZIP 2.04g mangles unknown extra fields (especially OS/2 extended attri-
- butes) when adding new files to an existing zipfile [example: Walnut Creek
- Hobbes March 1995 CD-ROM, FILE_ID.DIZ additions]
-
- - PKUNZIP 2.04g is unable to detect or deal with prepended junk in a zipfile,
- reporting CRC errors in valid compressed data.
-
- - [Windows version 2.01] Win95 long filenames (VFAT) are stored OK, but the
- file system is listed as ordinary DOS FAT
-
- Possibly current PKZIP bugs:
- ---------------------------
-
- - PKZIP (2.04g?) can silently ignore read errors on network drives, storing
- the correct CRC and compressed length but an incorrect and inconsistent
- uncompressed length
-
- - PKZIP (2.04g?), when deleting files from within a zipfile on a Novell
- drive, sometimes only zeros out the data while failing to shrink the
- zipfile.
-
- Other limitations:
- -----------------
-
- - PKZIP 1.x and 2.x encryption has been cracked (known-plaintext approach)
-
- [many other bugs in versions 1.0, 1.1, 1.93a, 2.04c and 2.04e]
-