Some issues here were just marked 'resolved', but Special:ExtensionDistributor gives me same version as the version it gave before issues were marked resolved.
Topic on Extension talk:MsCatSelect
To download the latest, you should select the "master" version. I just tried it and I got the latest version (7.1) with no problems. Can you try again? Once you get and install the latest version, make sure to do a hard refresh (shift + ctrl + R) to load the latest JavaScript. Cheers!
thx, i'll try it. So i should not use MW's ExtensionDistributor, correct?