Its like the Client and the server get out of sync and its constantly trying to place u where it 'thinks' you are.
If youve only just had it started happening, my guess would be server load causing it to hiccup abit.
I get it too. Also while I walk/run I get it, but I mostly see it when I pass another character, its like I get pushed back or shoved to the side.
That's normal, player collisions, just like ship collisions. Heh, coming from WoW I find it cool, but annoying, cool that a team of players can totally block a hallway in ground combat, annoying because if a group of NPC's run into me they push me all around the spacedock lol