I have a new imac with osx 10.6.8 and can't get letter box to open in the mail window with 3 columns.  I have downloaded the latest version and it also didn't open in 10.6.7.  Any ideas?

Letterbox downloads and installs and is enabled, but does not produce the 3 columns in the mail window.  I had the same problem with 10.6.7 and now 10.6.8.  The download is the latest version (0.24b9) and the forums indicated that it works with both osx versions.  I have tried deleting the letterbox plug-in and then reinstalling, but still no luck with the 3 column mail page.  Any ideas would be most welcome.  Thanks

i just fixed this on my machine running 10.6.8. the typical workaround is to add appropriate UUIDs, which get updated with each new os build, and break plugins (see here). Follow those instructions, but instead of adding the UUIDs they suggest for 10.6.7, add these (I found them on my machine running 10.6.8, and they work):
064442B6-53C0-4A97-B71B-2F111AE4195B
588FF7D1-4310-4175-9980-145B7E975C02
for fixing on os x version 10.6.7, this may help (though letterbox 0.24b9 should work already).
i emailed the author (aaron harnly, harnly.net) about this, but haven't heard back (a few days). to be sure, i am quite grateful, as i think we all are, for his excellent plugin, and this workaround is quite simple for dealing with updates.

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