Actually I get the same issues. One of my Uploaders told me last night the Spankwire upload was busted.
Now, I seem to recall MG was streamlining their overall tube operation. For example, with Keez Movies (who I used to upload to) they now scrape videos from Pornhub (I believe). So no need to upload to Keez any longer if you upload to PH. So maybe this is what is happening, they are changing the way the uploads work?