Well, I think that this feature inside Maxthon is useless and should be removed. If I have "check for beta versions" checked and Maxthon says I'm up to date, then I should be up to date. I was very excited that no longer I will need to check the daily release page and that Maxthon will download automatically the latest official/beta versions. Boy was I wrong.
Knowing that message "Maxthon browser is up to date" might not be true is very disappointing and misleading.