I'm re-using reports in my sonar config:
sonar.gallio.mode=reuseReport
sonar.gallio.reports.path=gallio-report.xml
sonar.gallio.coverage.reports.path=results.xml
I've previously run Gallio and OpenCover and can confirm that both completed successfully and that Sonar is able to retrieve the files (I've checked the log produced by the -X flag thoroughly). When I view the project in the sonar dashboard, I see code coverage, but not test results:

Kindly ignore the low code coverage percentage, I'm running a small subset of tests while I figure this out.
I should see something that reflects the results I saw when I ran Gallio:
14 run, 13 passed, 1 failed (1 error), 0 inconclusive, 0 skipped
I'm happy to include the gallio-report.xml if that's helpful, but it's 103kb so clearly it contains plenty of data, and I think this is more likely to be a configuration issue.
I'm running OpenCover 4.0.1118 and Gallio 3.2.750 (tests are written with NUnit).
Any thoughts why I don't see any test results?