hmm I ran into this problem a while ago :S

whereas the Letter Ð works fine in my macros the letter Æ does not.. I don't know why that is but it is rather frustrating :S can't macro my warlock into many macros (Ælures is his name).

Unfortunately you may have to change your name :S but try everything you can first before changing name, it's possible it's just coincidence you are having the same problem as me on a similar letter

EDIT: Hmm soz just reread your post, seems your having a different problem :S ur able to macro with that letter ok on some of your toons? I can't figure out what's going on there then :S