Thanks, PatStat. Just going back to my original post, though, my main question is whether there's a way of learning of these changes before they happen.

And the links from the oral proceedings calendar don't work either. There's a link from the calendar to the EPO register for that case, but it uses the old URL format so it now gives a "Page not found" error (the same one which I started seeing this morning). Oh dear...

Maybe even the EPO hasn't noticed the change. At the top of the page, the number and title are shown, and next to that there's text saying "Right-click to bookmark this link". Unfortunately, though, the URL here is in the old format so it doesn't work! The old URL format included "/es...

Yesterday I was able to use this URL format, which has worked since we wrote some custom tools in June 2011: https://register.epo.org/espacenet/regviewer?CY=EP&LG=en&DB=REG&PN=EP1641822 But today this does not work, and instead I need to omit the /espacenet part of the path: https://regi...