What's Up with Deviantart?

It seems that when I upload from Deviantart, I've been getting denied and given an "Unauthorized" notice by the system more often and completely randomly (so one image is denied, whereas another goes through just as normal). Sure, Deviantart has always been quite finnicky, but I've noticed that I've been uploading more image samples from there that cannot be easily replaced, which isn't great, and it's starting to frustrate me.

Is anyone else having a similar issue?

This is happening with Tumblr as well, from my experience. Having a hard time uploading from either Deviantart and Tumblr, which is pretty bad considering those two websites usually have the highest quality versions of an existing art.

Update: having problems when uploading from Newgrounds too.