3.0.5 was just released which fixes this bug completely.
Very good!
So, to recap, if we upgrade to 3.0.5. we can run Electrum and browse the web or run other apps at the same time safely, with no worries, right?
Also, why Thomas is not speaking in this thread? This is one of the worst problems in the whole Electrum history and it's strange its main developer wrote nothing about that here on bitcointalk...