OK, here's my report.
Ever since the server switch, TK had downtimes for me whenever I try to get onto the site. message is IIRC, 'server not found'. This would last a few minutes up to two days. I've been trying with different browers, different PC's, different IP's, hell, even with PC's in different cities.
Then I bought a netbook with Windows 7 and FF and voilà, TK works like a charm, even when my simultaneously running PC gives me the error message. Strange, but true.