Portage wants to install emacs-21.3-r4 in addition to the emacs-21.3-r3 that is already on my system, instead of updating to -r4 and unmerging -r3. Reproducible: Always Steps to Reproduce: 1. 2. 3.
Sorry for the inconvenience. I fixed it in CVS. (moved SLOT was not 21 but 21.3) It will be available in an hour. Thanks for the bug report.