We've had several users complain recently about screen pauses during gameplay. This has been tracked down to the no longer in use Massive Ad system. It will be addressed in the next patch, but if this happens to you please use the following work around found by user Twyrix:
Add this lines to your hosts file (c:\WIndows\system32\drivers\etc\)
127.0.0.1 media.madserver.net
127.0.0.1 imp.madserver.net
127.0.0.1 ad.madserver.net
127.0.0.1 locate.madserver.net
Add this lines to your hosts file (c:\WIndows\system32\drivers\etc\)
127.0.0.1 media.madserver.net
127.0.0.1 imp.madserver.net
127.0.0.1 ad.madserver.net
127.0.0.1 locate.madserver.net