Meta-data with 0x00 #16

Many files in my collection have 0x00 (i.e. character with code 0) at the end 
of artist and/or title 
properties. I don't know where they come from, but it seems to be quite usual 
problem.

iTMW chokes on these files with the following messages (one by one):

--------------------------
sh: -c: line 1: unexpected EOF while looking for matching `''
sh: -c: line 2: syntax error: unexpected end of file

<hit OK>

<same message again>

<hit OK>

AppleScript Error
Can't make {button returned:"OK", text returned:"", gave up:false} into type 
Unicode text. (-1700)
--------------------------

iTMW is 1.4 (0.941), iTunes is 7.4.2 (4), Mac OS X is 10.4.10.

P.S. iTunes silentyly replaces these characters with underscore "_" during 
"meta-data -> 
filenames" conversion.