New version mainly includes bug fixes. See the official change log at http://www.slimdevices.com/Changelog6.html for more details.
Just to note, bumping the previous ebuild in a local repository worked fine for me.
Oops, I guess the ebuild did need one change since upstream foolishly altered their internal package naming scheme with this release. The attached ebuild resolves this issue. However, if anyone has any ideas of how to make it more portable to later releases feel free to make changes. Hopefully, upstream returns to its slightly more sane internal package naming scheme so we don't have to always change ${S} with every release.
Created attachment 127807 [details] slimserver-6.5.3.ebuild
Thanks, now in CVS.