Perhaps your ISP is screwing with you guys then?
If you have a router, bounce it, perhaps its acting up.. and Id try it on a 2nd computer, new install, etc. to narrow it down to either your machine or ISP. But if it is your ISP, not sure how you can get it fixed, cant tell them why you are calling for help .. :) Nothing fancy here, just start going down the list to eliminate all the options to know what to focus on.
Ill have to hop on and DL some random stuff tonight and see if things have changed for me. I rarely get stuff these days, just share on a regular basis ( not 24/7 ). The only notices i see on my uploads is stuff like user logged off, or canceled. No 'errors' ( but if their network dropped, perhaps it will look like it was intentional from my machines side. donno )