#11 — Can't save edits to image

I try to save edits to an image, and I get the following error: Traceback (innermost last): Module ZPublisher.Publish, line 138, in publish Module ZPublisher.mapply, line 77, in mapply Module ZPublisher.Publish, line 48, in call_object Module Products.CMFFormController.FSControllerPageTemplate, line 91, in __call__ Module Products.CMFFormController.BaseControllerPageTemplate, line 28, in _call Module Products.CMFFormController.ControllerBase, line 231, in getNext Module Products.CMFFormController.Actions.TraverseTo, line 38, in __call__ Module ZPublisher.mapply, line 77, in mapply Module ZPublisher.Publish, line 48, in call_object Module Products.CMFFormController.FSControllerPythonScript, line 107, in __call__ Module Products.CMFFormController.ControllerBase, line 231, in getNext Module Products.CMFFormController.Actions.TraverseTo, line 38, in __call__ Module ZPublisher.mapply, line 77, in mapply Module ZPublisher.Publish, line 48, in call_object Module Products.CMFFormController.FSControllerPythonScript, line 105, in __call__ Module Products.CMFFormController.Script, line 145, in __call__ Module Products.CMFCore.FSPythonScript, line 127, in __call__ Module Shared.DC.Scripts.Bindings, line 322, in __call__ Module Shared.DC.Scripts.Bindings, line 359, in _bindAndExec Module Products.PythonScripts.PythonScript, line 344, in _exec Module script, line 1, in content_edit - - Line 1 Module Products.CMFCore.FSPythonScript, line 127, in __call__ Module Shared.DC.Scripts.Bindings, line 322, in __call__ Module Shared.DC.Scripts.Bindings, line 359, in _bindAndExec Module Products.PythonScripts.PythonScript, line 344, in _exec Module script, line 12, in content_edit_impl - - Line 12 Module Products.Archetypes.BaseObject, line 667, in processForm Module zope.event, line 31, in notify Module zope.component.event, line 24, in dispatch Module zope.component._api, line 136, in subscribers Module zope.component.registry, line 321, in subscribers Module zope.interface.adapter, line 585, in subscribers Module zope.component.event, line 32, in objectEventNotify Module zope.component._api, line 136, in subscribers Module zope.component.registry, line 321, in subscribers Module zope.interface.adapter, line 585, in subscribers Module unweb.iptc.subscribers, line 176, in updateIPTC Module unweb.watermark.subscribers, line 60, in applyWatermark Module unweb.watermark.subscribers, line 24, in reduce_opacity Module PIL.Image, line 741, in copy Module PIL.ImageFile, line 189, in load Module PIL.Image, line 383, in _getdecoder IOError: decoder zip not available This did not happen yesterday. Maybe imagetags/watermarks are getting in the way? I can save edits to a page just fine.