I'm using Xoops 2.0.14, before upgrading from 2.0.13.2, nothing problem happen.

Module WfDownloads 3.1 Final
But now i can't upload any file, its goes blank to page mydomain/modules/wfdownloads/admin/index.php?op=Download

Module System (Login Block & Administration Menu)
After login i was drove to mydomain/user.php

after that, i have to click back button and refresh. After that i was login.

I'm using your auto-login hack for xoops 2.0.14 and xoops protector 2.57. Don't know whether it is related to your hack and module or not. But seem to be many pages goes blank.