Shhh! Don't tell anyone but I'm quietly confident that things are sorted.
With that (hopefully) fixed I've been looking at building a search function, I just need to work on pagination.
And a search page is born:
I just need to adjust the CSS a bit and work out how I'm going to include it on the bottom menu. Pagination is implemented but I may rejig it at some point as I think it's a bit clunky. It does what it's supposed to but I'm sure there's a cleaner, more elegant solution.
With a working search function I can also look at migrating my Linked Hashtags WordPress plugin.
A quick #hashtag test.
OK, so that worked first time. I'm a little shocked and surprised.
Update: The hashtag links are now literal, I mistakenly made them relative, so will work via the RSS feed.