Collision bugs

There appear to be some bugs in CS's collision code, especially when using csColliderActors. These exist in walktest, and I can't seem to find a way to stop them existing in my game too.

Bug 1: (more noticeable with a first person camera)
Steps to reproduce: Walk into a wall and keep walking in that direction, against the wall.
Effect: The camera jitters back and forth. It's not a huge problem, but it could make a game look unprofessional.

Bug 2:
Steps to reproduce: Jump up to the edge of a ledge (like a box or high step), wait for the player to start falling and press and hold the forward key while he's falling back past the edge of the ledge.
Effect: The player will 'stick' to the wall underneath the ledge, vibrating up and down. When you let go of the forward key he shoots down to the ground at high speed.

EDIT: Just realised this should probably have gone in Bug Reports. Can't seem to move it though.