When I first tried tagging, I was sure I'd done everything right (these tags ain't exactly rocket science); I tried pinging them direct and also later (in desperation) through Pingomatic too - and yet, though the pings seemed to be successful, none of my posts showed on their tag pages, even after raising the matter with Technorati support and chasing them a few days later... until last night, when the whole lot suddenly appeared at once on Technorati's tag pages, mysteriously all dated the same date (of yesterday). So it took a whole week, and going to Technorati support, for my posts to show up on their tag pages. I think that for some reason they'd just not been indexing my blog. I'm still looking into why - too many posts with tags on one single blog page, for instance? I'll post further as and when I find out.

[Added 14 June 2005:] I've now got as much info out of Technorati as I've been able to, and summarised why sometimes your posts don't appear on Technorati's tag pages, even though posts before and after them may appear - for an explanation of what's behind these problems and possible solutions, see this post including this comment by Niall Kennedy of Technorati regarding validating your blog. Note that the problems continue - sometimes certain posts don't get picked up on the tag pages even though you can find them on Technorati by searching. For days or weeks at time, you may find that none of your posts get picked up at all - I've had at least 3 spells of my posts not getting fully indexed by Technorati for tag purposes; the last time, they had to tweak something behind the scenes to get their crawler to start recognising my tags again. I can only suggest that you make it a habit to regularly check that your posts are appearing on Technorati's tag pages, and if not, get on to Technorati support immediately and try to keep the "missing" posts visible on the main page of your blog (not slipping into an archive) until they've sorted it, or else they will never get recognised on their tag pages.

[Updated March 2006:] The last time I had problems, in February 2006, I decided to test what it was about the post that Technorati's system didn't like. I've posted my findings, and David Sifry Technorati's CEO says they're puzzled too, but they're on it. If you suffer problems with certain of your tagged posts not appearing on Technorati's tag pages (but appearing on say Icerocket's), you should report the bug to Technorati, giving them a link to the problem post's permalink, which should help them work out what's going wrong. I sure hope they sort it out soon!

[Added 13 August 2006:] I have since had an issue again with two posts where some tags did not get indexed. Technorati told me that it seems that they did pick up the tags, but then due to an index glitch the tags were dropped mid-way through. Thus the posts fell into the last category mentioned in the previous section (if a post has been indexed before and the tags indexed before, then if changing the tags, deleting or adding tags to the post, the changes do not get indexed). So the tags were treated as "previously-indexed" (because they were - they just got lost in Technorati's system) - and they could not be indexed again after I updated my posts and the posts stayed on my main blog page. I raised the problem with Technorati who tried to override that in the back end and have the tags indexed, but they were unsuccessful. I don't know if it's related to the bug that I've mentioned before, but I wouldn't be at all surprised.