I'm having trouble uploading files to my .Mac account. The file I'm trying to upload is a 70mb .dmg file. I'm on leopard and connect with an Airport extreme Basestation with comcast cable to the internet. I never had problems in the past with my .Mac service, and this files is not that large. Finder just sits there and does nothing. The message in the Finder upload window reads "file closing". I can't end the upload without having Finder lock-up and crash the entire os. Powerbutton shut-down is the only thing that helps. Any suggestions?