Title says it all. But to explain myself a little bit further:

1)Sometimes, I click on link (Nightclubs, Attacks, Friends...) and get white page with Enviroment not defined message in top left corner. Clicking back button helps, but it is annoying.

2)Sometimes directly after new TC day stars, sometimes 10 real minutes later, TC lags, is unlogging you and then you get server errors.