I need help tweaking an iTunes script to add comments

Question

Hi all,
as I don’t want to carry all the tracks in iTunes on my iPod, I have it to update some playlists only. One of these playlists is a smart one, that looks for the comment "Go iPod". And I have an applescript that sets the comment for the currently selected song(s) to "Go iPod".
It also skips to the next song in the library/playlist.
The script worked for over a year now, but today it got a hiccup. Instead of altering the comment for the curryemtly playing song and skipping to the next one, it alters the comment for two songs and skips to the third. Has something changed in iTunes 8.1?
Here’s the script:
property separator : "
tell application "iTunes"
set thePlaylist to view of front browser window
if selection is not {} then
set sel to a reference to selection
else
if thePlaylist is not library playlist 1 then
set sel to a reference to every track of thePlaylist
else
display dialog "Select a track or playlist" buttons {"Cancel"} default button 1 with icon 2 giving up after 15
end if
end if
play (next track)
repeat with this_track in sel
set this_track's comment to ("Go iPod")
end repeat
reveal current track
end tell
What do I have to change?
Message was edited by bambule: made everything in the script English and reformatted the post

Answer 1

UPDATE:
Apparently the script is ok. It works like a charm when I select it via the scriptsmenu.
Alas, I have assigned it a keyboard shortcut. And scripts that are envoked by a keyboard shortcut are running twice in iTunes 8.1.
Off to file a bug report.