Are you editing the .css files? If so then that's your problem - you need to edit the LESS files:
Ohhh, I have read several times that it´s made with less... Thanks.
when i open a new page of topic list,it's take too long time and server's cpu 100%
when i click next page but paging auto jump back
my server config
CPU very hight, just open page, nothing to do
I noticed the jumping on pagination as well, will work on a fix for this.