On a more or less vanilla install of gentoo 1.2 + kde3 that I just finished, tkseti will not emerge. This was happening yesterday so I can't remember the exact error returned, but it was something like "can't find setiathome in "some path." When I put setiathome (the executable) in the path it wanted, it still would give me the same error. I went to the tkseti home page and pulled down their latest binary, decompressed it, and the binary ran just fine without fuss.
tkseti is masked for the moment, while things get tested. It should be back online in portage within a week or so.
ok, tkseti is now unmasked again, so please try to emerge it and report.