I'm hoping I'm not the only one who notices this, but randomly when trying to move slowly, my character seems to slide instead of taking a single step. When I'm slowly trying to sneak around a corner or behind someone, most of the time I end up sliding right into them or past the corner.

Is there any known way to fix this?

Also, someone on the Nexus forums told me I should be using the breathing hotkey to help steady my rifle for more accurate shots, but that key doesn't appear to exist and something tells me he or she may have been screwing with me. Any input?

I have not noticed it but then I do not use third person and only use first person.

The holding your breath is from a mod. I only know of Fallout Wanderers Edition (FWE) mod has that as part of its overhaul mechanics. I think that feature was add part of the changes made to scoped weapons.