Can't see some AoE effects of bosses

[HacKey]

Hi guys,

this problem is seriously annoying: for some bosses I can't see their aoe ground effect.Like the 1. boss in Charmers Caledra or 2. in Lanterns...really annoying and frequently causes wipes.

[Dreamz]

I have exactly the same problem, and so do some of my guildies. No idea of the cause either because occasionally we can see it but most of the time we cant, and it only seems to be certain spells :S