Technorati, which I've posted about before, and which led me to try an experiment whose interesting but curious results are posted here.
Just to recap briefly - even when you've tagged your posts properly, sometimes a particular post won't show up on Technorati's tag pages for any of the tags you've used. The problem seems to be specific to the post - if it won't show up on one Technorati tag page, it won't show up on any of them; yet other posts before or after the "problem" post will show up fine, and the post still gets tagged properly on e.g. rival blogosphere search engine Icerocket.
Thanks to Kent Newsome, Welcome to Wallyworld and Successful Blog and Solar Dweller, amongst others, for mentioning my post and helping to draw attention to the issue.
And some good news - Dave Sifry, Technorati's CEO, emailed me about my test results, to say:
This is an AMAZING bug report. Wow, thanks. We're on top of it and will be in touch if there's any questions. This issue has been puzzling us for a while - I hope that your post and excellent data helps our engineers to get to the bottom if the issue quickly...
...Thanks for the FANTASTIC bug report, it gave us a lot to work with.
...We continue to debug and develop to fix this stuff...
So, it's great to know that they're on it. Clearly the issue has been puzzling them as well as us - and to help them to get to the bottom of it quickly, may I suggest that if anyone else suffers problems with certain of their 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.
If you have time and want to try the same thing as me, i.e. break your problem post down into separate bits and repost each individual section to see exactly which section Technorati's system doesn't like, and again submit an error report about the problem section to Technorati, that might also help speed up resolution of the problem - I think they want to sort it out as much as we do!
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