Recently, several 3rd party apps on my mbp have been unable to connect to the internet. These include but are not limited to: Dropbox, Google Drive, Skype, Transmission, Evernote, Steam, Trillian, plex, several little useful apps such as mailtab for gmail. The Mac App Store is also having issues. I can, however, use Safari to browse with no issue at all. I'm connecting via wifi, no proxies or vpns or anything like that. Can anyone help me out here?
Mac OS X (10.6.5), 2.4 GHz intel core duo , 8gb ddr3