abiword 2.4.1 puts abiword_48.png into /usr/share/icons/. (abi/GNUmakefile.am has icondir= $(datadir)/icons) In src_install() changing make DESTDIR="${D}" install || die "Installation failed" to make DESTDIR="${D}" \ icondir=/usr/share/pixmaps \ install || die "Installation failed" installs abiword_48.png into /usr/share/pixmaps.
This "bug" is still valid in abiword-2.4.5
Added a fix to 2.4.5-r1 and 2.4.6 based on your suggestion.