Typo in a permalink

I try to correct any error - typographical, grammatical or otherwise on my blog whenever it is brought to my notice (- not that this has happened many times ;) ). But a typo in a "permalink" (first pointed out by Srikanth) of a post on which people have already commented seems impossible to rectify. (Look [carefully]: http://abhijitpai.blogspot.com/2007/09/mrsit-changed-timings.html)