The jfs0328 file contains the latest JFS.IFS/JFS.SYM , UJFS.DLL/UJFS.SYM,
the JFS.TDF and the TRC012F.TFF file.
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Please unzip this file in the \OS2 directory after you have made a
backup of the following files.
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\OS2\JFS.IFS
\OS2\JFS.SYM ( IF PRESENT )
\OS2\DLL\UJFS.DLL
\OS2\DLL\UJFS.SYM ( IF PRESENT )
\OS2\SYSTEM\TRACE\JFS.TDF
\OS2\SYSTEM\TRACE\TRC012F.TFF
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The modules contain some important fixes.
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Fixes in JFS.IFS:

Trap when swapper file is on JFS volume.
Hang when swapper file on JFS volume is being truncated.
Hang with heavy file I/O on JFS volume 

Fixes that have gone into UJFS.DLL:

Cyrillic character files being moved into the lost+found directory.
Chkdsk takes a long time to complete Phase0 ( logredo ).