I got caught out by this apt bug when handling sasview. I had installed a local build of sasview with my patch for 4.2.0~git20180309-3. Stuart Prescott added another patch and uploaded.
I assumed apt had picked up on the update and installed the final, official version. But it hadn't, even though the contents and changelog had changed. I was left wondering why the "new" version was misbehaving (still showing the bug that Stuart had patched). Drew
