Given two Maven2 projects:

Project A (POM only)
Project B (Jar), has A as parent (build when SNAPSHOT-dependencies are built)

Now, when A is built (#1), a build of B (#1) is correctly triggered. A shows a DS dependency to B, B an US dependency to A.

However, when viewing build #1 of A, it shows a downstream dependency to B without a specific build number (none).

When comparing both projects via "project dependecies", no dependencies are shown, which is plainly wrong.

A small change to MavenFingerprinter should do the trick.