Walk mode...?
 

I'm not sure where to find any kind of a list of keybindings. I was going about my thing, and suddenly, i'm no longer running. I have no idea what key I hit to do this, but is there any way to make my character stop walking?

It's causing me quite a bit of trouble :(

Try logging out and logging back in. It's happened to me before too -- I recall that it started when I was in the middle of teleporting and took a hit from an enemy at the same time.

This happens to a lot of people, and I find it extremely annoying. Not sure how it's causes, but only way to fix it is to relog.

there is another way, just get hit by any enemy. this always works for me.

try this:
bring up your pistol ... hit the reload button... and then you should be fine.. works most times.. if not, relog.

Yes, this always works for me.

I usually start walking in the first place because of the pistol.

Adding to the chorus... Pistol it is. I found that I often get stuck walking after using take aim (which forces you to walk). Firing a shot or a reload usually does it for me.

yes i hate it when that happens i also got bugged when my health was stuck low and would not heal and the only way to fix it that i know of is to get hit again

log in and out thats all u can do

Logging helps, i'll try the pistol thing next time it happens. Thanks!

How to fix it depends on what caused it in the first place. If it happened while using the pistol and aim mode, reloading works as others have said. If it happened because you took a hit just as you are teleporting or moving between different areas (going from jungle to cave), the stun effect is stuck, it will clear up when you get hit again. Just be glad you didn't get hit by a fire or poision attack and got stuck with your health draining away without stopping. Had that happen as well.