I have a problem. In this configuration: WP 3.3.1 + qTranslate 2.5.28 + Magic Fields 126.96.36.199 in Firefox, IE9 and Opera, Posts or Pages which is created by write panel Magic Fields, cannot be save. In Chrome and Safari doesn't have this problem.
If I click on (e.g. in Firefox) switch editor language and after "update" button, then everything is ok.
Last configuration, when everything was ok in all browsers: WP 3.2.1 + qTranslate 2.5.24 + Magic Fields 188.8.131.52.
So this problem doesn't depend on version Magic Fields.
I checked this problem on new blank installation WP.