said by DarkLogix:
and last night when I was on my undead horde going to cap cities for the pet battle achev I kept getting knocked off my friend's rocket when I changed zones.
Same thing was happening to us! I could only assume that a new rule was put in that since he didn't have his flying license yet due to his level, that we could only cross zone by the roads and not over the mountains. I guess that explains that! That's a real PITA.