[post was deleted after seeing Bradley's following answer]
Sorry, as I did NOT see this, Bradley.
But I too had the same issue. Not to worry.
This is the same crash as reported here: http://community.logos.com/forums/t/52166.aspx
It will be fixed in Beta 2; until then, you may need to avoid using the command bar in Beta 1.
But, does it have "anything to do with my sync error triangle or todays install indexer failuresd? probably not?
Just in case here are indexer failure logs:
8510.Logos4IndexerError.zip
8233.Logos4IndexerCrash.zip
Thanks