Yeah, it's got to be server side. From what i've managed to learn, they keep some kind of list of mechs, components and such on the server. Once it gets updated from what's on your system, it checks for those things from then on and if it doesn't find the right files/changes in the right order it just keeps looking for them... forever. I find it hard to believe that such a horrible oversight was put into the game despite the massive modding community and interest show in such even before launch. They even led us on by saying that they weren't going to do mod support but giving us the go-ahead to change things if we liked. Still hoping HBS can find a fix to this, i've been locked out of the game since 5 days after launch now.