by Mobrak » Fri Jan 07, 2011 3:30 pm
Some AAs that would have worked at a certain level will no longer work at all if you level up purchase a higher level version of the AA then delevel. For example, at level 80 a ranger can train Headshot 10. The passive AA will fire on level 66 and below humanoids. At level 81, the ranger can train Headshot 11 and fire on mobs level 68 and below. If however, the level 81 ranger with HS11 dies and de-levels to 80, Headshot will no longer fire on any mobs of any level, period. So, not only do you lose the benefit of the higher level AAs, you've lost the benefit of the AA that you would normally have access to at your new, lower level.
I do not know from personal experience which AAs this bug/feature affects occurs other than Headshot.