Hello, I replaced media-libs/jpeg by media-libs/libjpeg-turbo on my system. icedtea recompiles with libjpeg-turbo and works without problems on ~x86. Please, change media-libs/jpeg -> virtual/jpeg dependence.
Didn't want to file a new bug, but dev-java/icedtea6-bin already has a dep on " || ( >=media-libs/jpeg-8 >=media-libs/libjpeg-turbo-1.0.90 )" which should be changed to simply virtual/jpeg.
Done, sorry for the wait.