evolution-data-server is being rebased for RHEL 5.2 (see bug #318631), so we'll need to rebuild ekiga against the newer e-d-s libraries at some point.
Assigning this to myself.
Product Management wasn't too keen on rebuilding a bunch of desktop packages that weren't on the Approved Component List, so I found a way to preserve the old ABI in libedataserver.so. This was the only library that changed since e-d-s 1.8.0. Devel NACK'ing since a rebuild is no longer necessary.
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