An update to eclipse was pushed today, however the eclipse packages don't have the appropriate drpms available.

A drpm is available from the 'base' eclipse-jdt-3.5.1-4.fc12, but not from the last update to -20 (https://admin.fedoraproject.org/updates/F12/FEDORA-2009-11860)

For example, I had eclipse-jdt-3.5.1-20.fc12.x86_64.rpm installed. /fedora/linux/updates/12/x86_64/drpms/ on my local mirror has eclipse-jdt-3.5.1-4.fc12_3.5.1-21.fc12.x86_64.drpm but no other relevant file.

I can generate a drpm locally using makedeltarpm, and apply it to the koji (unsigned) -20 package to get an identical package. This means that I have to download a 24M package rather than a 94k drpm. (Similarly for the 27M eclipse-platform package)

Some packages (eg NetworkManager) do have a drpm from both the initial version and the previous updated version.

I've seen this happen before (missing drpm) with other packages (internet caps in .au means I notice large package updates), but haven't previously looked into why.