I can not think of any reason whatsoever why Bob would/could be banned from the forum. Bob has made valuable contributions and has added a new view which is highly appreciated.
Maybe Bob has a dynamic IP address and will need to log in again when his IP address changes. I know that I need to every once in a while.
@Alex, can you have a look at this please. Bob should have access.
Have fun and ... be nice to the cats
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Relax ... it is just a font