would love to see an ebuild for it ;) thank you!
cp gimp-1.3.21.ebuild gimp-1.3.22.ebuild will do the trick. It would be nice to have this mentioned as well BTW "If you are upgrading from an earlier 1.3 release, please note that the gimprc and sessionrc file formats changed. We suggest you remove your personal ~/.gimp-1.3 directory and do a fresh user installation." It applies for upgrades of all 1.3.x to 1.3.22
1.3.22 has already been added, i did add the extra warning thanks for the report.