Alsius, inner realm, save between Monte and Hopstadt - Yetis can fly up walls too (questmobs too).

this happens alot at the syrtis fire alter, u can hardly ever find the particylat spider to kill

Another rather annoying problem, this time in Syrtis, is the gryphs...they spawn over the wall in the WZ making it very hard to find and kill them. And when you do run all the way round and find one, you click to attack and it "runs" through the wall back to its proper location near the alter.

Speaking of which, monsters running away from me when i click on them is getting really annoying, especially for my warrior...

If you read the change log this is being fixed in the next update at least. :) Even as a marksman it is annoying to see the mobs running away. :(

Guess I didn't read closely enough. :p

Hardly ever?
Its 3rd or 4th day there are no Guardian Beach spiders (actually there are only great ones) and Im stuck with quests :/

Sounds like we need more Mobs !!!!!