When the bump to KDE SC 4.3.3 was performed the changes between kopete-4.4.2.ebuild and kopete-4.4.2-r1.ebuild were lost. This way, the zeroconf USE flag turned back to bonjour. The change in r1 was made to fix Bug 307105. Reproducible: Always Steps to Reproduce:
Not in tree anymore, no such useflag anymore.
Fixed in the kde-base/kopete-4.4.4-r1 ebuild that should hit the mirrors in a few hours.