Update prompt from 7.5.5 to the same version
Yesterday I let Tor Browser update from 7.5.4 to 7.5.5. It used the incremental method and apparently the process was successful. I restarted the browser and got presented with the changelog page. The page about:tor shows "7.5.5" in the top right corner. The dialog at Help/About Tor Browser says "7.5.5 (based on Mozilla Firefox 52.8.1) (64-bit)".
From the root of the application directory I can see the file "Browser/tbb_version.json". It says:
{"version":"7.5.5","architecture":"linux64","channel":"release","locale":"en-US"}
Searching for "7.5" in about:config I can see:
browser.startup.homepage_override.torbrowser.version 7.5.5
extensions.lastTorBrowserVersion 7.5.4
extensions.torbutton.lastBrowserVersion 7.5.5
torbrowser.version 7.5.5
Yet the "Software Update" dialog (updates.xul) still prompts me to update to 7.5.5.
What gives?