Can't whisper
It sounds as if you’re experiencing latency between your computer and the “social” server (the one that handles friends list, chat, and the other non-exploration|combat details). Some possible reasons that’s happening (for you and not to others) can get very technical and for those, your best bet is to work with support directly. (Follow the links from top left to submit a request.)
In the meantime, you can try a couple of things:
- -repair your client, instructions on the wiki
- download a new copy of your program file (rename the old one to e.g. gw2.exe.old and go to the “My Account” subsection (upper right, under your userID on this page) and grab a new copy. Or (windows only) try the 64-bit if you’re on 32-bit or vice-vera, to see if that helps.
Good luck and please let us know what you find out.
John Smith: “you should kill monsters, because killing monsters is awesome.”