Aye, changing your rendering system may fix this, especially if you experience this on multiple characters.
However, yesterday I noticed that my own game kept crashing while I was in Fluorite, and I was able to fix it by resetting that character to his home via the forum. (You do this by logging into the forum, then clicking the "Character Reset" link in that same golden box at the top right of the forum. Put in your account info in the boxes provided, and you can reset your characters to their homes.)
This may also be a fix for you, since the server will sometimes cause the game to kick you off a time or two.