I keep getting 'log on in progress' messages on the TWS.I upgraded to ssl and IBs technical department said it sounds like someone trying to intercept information.During the log on the TWS goes a strange colour and freezes.I've been getting a lot of disconnections recently too.The log ons aren't during these.I stupidly told some locals I was trading,that's all.
The colour changes are all normal and just indicate that there is an interrupt in your connection. It sounds more like a poor connection issue than someone attempting to hack your machine. If you use Broadband try using dial up for a while and see if the problem persists. Also it is not uncommon for some IB users who are connected to a specific server to experience the same things at the same time with regard to connection and colour changes.