It seems to have gotten lots of bugfixes, mainly it builds now with --as-needed and I was able to remove some workarounds from the ebuild (including the missing headers patch)
Created attachment 201396 [details] dev-libs/ace-5.7.2.ebuild
Please attach unified diffs (diff -u) when you did changes to an ebuild. That would be much more handy for our devs.
+ 01 Sep 2009; Patrick Lauer <patrick@gentoo.org> +ace-5.7.2.ebuild: + Bump to 5.7.2, fixes #281651. Thanks to Priit Laes for the ebuild patch.