Noppes on "Zenphoto 1.4.4.4 can't apply groups"

Hi, recently I upgraded my zenphoto installation from version 1.4.4.3 to 1.4.4.4. Now when I go to the tab "groups" and press the apply button I get always (even without changes) the message:” Error The form submission is incomplete. Perhaps the form size exceeds configured server or browser limits.” I tried it with chrome and Firefox 19. Does someone have an explanation for this behavior?
Thanks
Norbert