This should be fixed in the next version; v1.3.4.@Chris D
my update checker is showing a 1 next to it but in the entire list of add ones I don't see any upgrade buttons. is there a log that this add ones keeps? or somewhere in the mysql DB can look for via phpMyAdmin to locate what add-one the update checker is seeing an update for.
Note; this version also implements (optional) semantic version comparison. So it should also stop offering older updates if you happen to have a new version locally.