Works perfectly for me

Dunno what all the other reviewers are complaining about. This app works fine on my iMac (Early 2009) and MacBook Air (Late 2011) running Mac OS X 10.8.2 and Wikibot 1.61.
Just tested and verified right before writing this review. And it was syncing my bookmarks and history between both computers, my iPad, and iPhone without any problem, so its iCloud syncing is working fine, too.
As far as Im concerned, this is the best Wikipedia app on the App Stores for both Mac OS X and iOS, because of its easy to use layout and iCloud syncing.
I highly recommend it.
And for the people having issues, maybe theres something else going on on your system thats causing problems with this app? Maybe time for a Genius Bar appt?

ATI2 about Wikibot — A Wikipedia Articles Reader