As we have seen today, we get notifications lately (since May 21st) which contains some bogus build ids. In detail between the buildid and the previous_buildid we have 2 days even a build from a day before is available. This might have been caused by bug 874885? May 21st: "previous_buildid": "20130519004019" "buildid": "20130521004018" May 22nd: "previous_buildid": "20130520004018" "buildid": "20130522004016" This totally breaks our update tests for daily builds because we check for the correct buildids. The following notification we got via pulsebuildmonitor: May 21st: {"locale": "en-US", "testsurl": "http://ftp.mozilla.org/pub/mozilla.org/firefox/tinderbox-builds/mozilla-aurora-linux/1369122018/firefox-23.0a2.en-US.linux-i686.tests.zip", "previous_buildid": "20130519004019", "job_number": 1, "build_number": null, "builddate": 1369122018, "tags": ["nightly"], "platform": "linux", "version": null, "revision": "a0305227b47a76c188a8533734ece8a0064f926f", "status": 0, "buildtype": "opt", "product": "firefox", "slave": "bld-linux64-ix-033", "buildername": "Linux mozilla-aurora nightly", "buildid": "20130521004018", "timestamp": "2013-05-21T09:37:26Z", "key": "build.mozilla-aurora-linux-nightly.1.log_uploaded", "logurl": "http://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/2013/05/2013-05-21-00-40-18-mozilla-aurora/mozilla-aurora-linux-nightly-bm57-build1-build1.txt.gz", "tree": "mozilla-aurora", "buildurl": "http://ftp.mozilla.org/pub/mozilla.org/firefox/tinderbox-builds/mozilla-aurora-linux/1369122018/firefox-23.0a2.en-US.linux-i686.tar.bz2", "release": null} May 22nd: {"locale": "en-US", "testsurl": "http://ftp.mozilla.org/pub/mozilla.org/firefox/tinderbox-builds/mozilla-aurora-linux/1369208416/firefox-23.0a2.en-US.linux-i686.tests.zip", "previous_buildid": "20130520004018", "job_number": 2, "build_number": null, "builddate": 1369208416, "tags": ["nightly"], "platform": "linux", "version": null, "revision": "10738444bf15b09de4c85d6594f4b56aab4ad520", "status": 0, "buildtype": "opt", "product": "firefox", "slave": "bld-linux64-ix-029", "buildername": "Linux mozilla-aurora nightly", "buildid": "20130522004016", "timestamp": "2013-05-22T09:49:09Z", "key": "build.mozilla-aurora-linux-nightly.2.log_uploaded", "logurl": "http://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/2013/05/2013-05-22-00-40-16-mozilla-aurora/mozilla-aurora-linux-nightly-bm61-build1-build2.txt.gz", "tree": "mozilla-aurora", "buildurl": "http://ftp.mozilla.org/pub/mozilla.org/firefox/tinderbox-builds/mozilla-aurora-linux/1369208416/firefox-23.0a2.en-US.linux-i686.tar.bz2", "release": null}

I'm fairly sure that this was the similar underlying cause as bug 858953.