Could anybody tell with what this issue could be connected? Forums seems slow when using them on smartphones with good internet connections. Especially it reflected on typing and auto-login - these always go with huge delays. It's my own experience on Blackberry Passport, but my users also have the same problems on other devices. As for page speed insights my score is there: http://developers.google.com/speed/pagespeed/insights/?url=rd-forum.ru&tab=mobile Thank you.