A problem in who's opinion eh? Naturally as an archer I have the opposite reaction and I have invested an entire 8 athletics into my build and light armour goes hand in hand with that however I don't see it anymore of a problem as I do that most melee based characters can one hit me, the same that xbows can one shot me.
I don't understand why there is a massive amount of these "ranged shouldn't be able to kite" just because someone has gotten a little annoyed over an archer who is out running them, if you're silly enough to chase them, you deserve to get shot. It's much much much easier to avoid range (archers in particular) by running the other way and weaving, the more time that person takes, the less of a chance they have to hit you because their target gets smaller all the time they wait.
Archers kite because it's a valid tactic against players who are either too thick to understand that running away is the better option, kill hungry or just down right persistant.
I hardly see anyone do this and honestly, it's rather disturbing how people have a willingness to chase something faster than themselves that can hit them from a range. I can't quite believe that I have had to 1, type this again, 2, people still haven't worked out that it works and 3, there are advantages and disadvantages to every class, they're the most balanced they have ever been, just because Robin Hood can move quicker than Monty Python's Black Knight doesn't mean that it's a problem; that's a matter of opinion.
EDIT: You're not bloody AI, you don't have a fixed list of commands that start and end with "must chase archer".
Are you seriously stating that infantry should RUN away from ranged to survive and hope that his ranged troops do the job ?
Kiting shouldn't be valid tactic, this was main reason why this game become more and more ranged-oriented, do you know why so many people have xbow nowadays ? Yep, because of archers who can kite. And few infantry who don't have one of the following: shield, high athletics, plat.
You know what is problem, too ? I, with 53 body armor and 18str and 2 ironflesh, am 2 hit killed by some stupid archer who have just 18/21 str. Maybe i'm even 2 hit killed by guy who have just 15 or even 12 strength, i don't know for sure. So you as an archer can totally agiwhore and still kill your targets with ease.
It's not like archers can't fight back, even with minimal investment they can be deadly in melee (just take mace instead of one pack of ammo, you don't even need much ps, if any at all to fight back).
I'm ok with archers who want to run away, but i think that he should drop his bow to do it successfully. And make all bows unsheatable and with 3x their weight (before you say it's unrealistic, shield weights are unrealistic too - it's called game balance). Make all arrows 2x their weight. Reduce damage of arrows by 2, bodkins by 3. Reduce looms effects on bows and arrows. Problem solved.