A few people in the last couple of days have emailed me with comments that they tried to post to the blog, particularly to the QRT item. André, M0JEK explained the problem as: "The window keeps getting chopped so I can't enter the code."
I have just tried to post comments using both Firefox 3.5 and Internet Explorer 6 (since I don't use Internet Explorer, I've never bothered installing a later version) and can't see a problem. So if you do experience the problem and are clever enough to know what the reason is, I'd appreciate it if you would let me know.
[Wild guess.] Perhaps it has something to do with how you are receiving the blog, such as through a feed aggregator?