This came up in our RTL campaign last friday:

My party headed into a dungeon, played a level or two, then fled back to Tamalir, where two lieutenants were sieging the city.

The question then is, was I allowed to encounter the lieutenants on the same turn that I fled or would I have had to wait a turn? We eventually took for the first option, but I was wondering how you guys would play this out.

From the new FAQ:

Q: Can the heroes Visit buildings, purchase Tamalir upgrades, or fight lieutenants if the party marker is placed in Tamalir after ending/fleeing a dungeon?
A: No.

Big Remy said:

Ah we must have missed that one, we only noticed this one:

Q: When the heroes return to Tamalir after completing a dungeon, can they Visit the town?

A: No

Different wording then the one you quoted, means a different interpretation? (allowing a battle with a Lt?) Or just FFG sloppiness in wording and they should be the same?

They pretty miuch say the same thing. The FAQ sadly has some redundancies in it that the people editing it must have missed.