I've installed 2.5_beta6 on ~amd64, and it works perfectly for me. I suggest it be keyworded ~amd64.
I installed IE's 6 and 7 with german locale and the following things occured: 1) At the end of the install process, it says: which: no ie6 in (/usr/local/bin:/usr/bin:/bin...) /home/robert/bin/ie6 which: no ie7 in (/usr/local/bin:/usr/bin:/bin:...) /home/robert/bin/ie7 2) IE6 and 7 do not display png images. 3) IE7 cannot open the "Settings" dialog. I'll keyword this baby ~amd64 as it pmasked anyway, but you might want to have a look into this.
I'll let upstream know about these issues
ies4linux was dropped time ago