Hack Attempts? Result: chosen nickname

I’ve noticed a big jump in page hits the last couple of days to one particular post on my blog. This particular post has not been nearly this popular in the past.

99% of the hits are coming from a IE6/WinXP setup and the IP is being masked (127.255.255.255) almost every time. So, not really any help there.

Looking through the stats, I see a bunch of 404s for the name of the page/post, with: +++++Result:+chosen+nickname+"loyaryAmomb";sent; at the end.

Now, there’s nothing I can see different (changed) with that page or page source, but I was wondering if anyone’s seen this or have any ideas about stopping this (it’s plain annoying). Should I be overly concerned?