With the recent security updates, I've been unable to apply patch 3941 onto Magento 220.127.116.11.
I did initially install the 8788 V1 patch, but I reverted that patch to install 8788 V2. I've checked and never installed 1533 patch. When I try to apply SUPEE-3941 I get the following:
I checked my applied patches log and confirmed patch 1533 has never been applied. Seems to be a different error than what everyone else was referencing. I tried making a blank downloader folder, but I ended up getting a different error related to the files not existing.
UPDATE: Looks like i didn't remove 8788-V1 Yet. I removed it and 1533. When trying to apply 3941 I get the same error as above.