Just a heads-up that I will be testing some updates this evening.
The nature of the changes means it's difficult to test every scenario in advance offline (translation: it's a lot more effort and I just can't be bothered) so I'm going to go with the "wing-it" approach:
Deploy, check for errors, try to fix errors before anyone else notices them.
I can switch between the new and old version pretty quickly so if there are significant issues, I'll rollback and revert the changes while I work on the fixes. Worse case is the pages won't display quite right (dates might be a giveaway) but a full page refresh should fix things.
So, if something doesn't seem right or part of the site isn't working as expected, the best thing to do is just wait a few minutes and then refresh the page.
I'll post on this topic to keep you updated of progress, post here if you notice any issues that persist for longer than 10 minutes or so.