/follow issues in wotlk

[Ken]

I noticed this new problem with WotLK as well. Very annoying when it happens, but at least it isn't happening everywhere.

I only seemed to have trouble moving in and out of the misty area in Borean, everywhere else has been just dandy :)

Phased content ;)
I have the same problem in that region.
If you watch it more closely, you will actually see your alts diappear for a moment when you all enter the 'instance' simultaneously (broadcast the forward movement key).