fold.it appears to be downloading around 300+ ir_puzzle files each time you log in, most appear to old expired puzzles marked "phase" : "Hidden". the repeated downloading makes logging in seem to hang/take painfully long
attached is a list of the puzzles being downloaded on a fresh install
I guess you can disregard this, it may have cleared up on its own
For a short time the server was reporting a large number of puzzles to the game. This should be fixed, although they are probably still cached by your game. Deleting the extra .ir_puzzle files manually may help, until we add a way to clear the cache from the game.