Flash: Bunch of fixes to avoid various errors during cancellation of the current upload. As suggested in #513.
Flash: Bunch of fixes to avoid various errors during cancellation of the current upload. As suggested in #513.

vitr/fend005-plupload,vitr/fend005-plupload,moxiecode/plupload,envato/plupload,envato/plupload,moxiecode/plupload