First of all: thank you for the new feature "watch changes in category membership"!!
One thing I noticed: the link to the page history isn't working (see attached screenshot, lowest line "05:37"). Clicking on "hist" opens the file description page, not its history.
And if there are more than one actions for a category (see screenshot "08:54") there is a link to the category's history (not too useful IMHO) but none to the files' histories and diffs.
This only happens if the "group changes by page" option is activated in the settings for recent changes.