possible security problem?

[eluser]Davcon[/eluser]
I agree.

The fact that both time gaps are a second apart suggests an automated script.

There is some very ruthless hacking software out there right now. For example, two weeks ago I discovered a very nasty piece of software call Havij. Very nasty indeed! Not only does it do SQL injection attacks but it even decrypts MD5 passwords. I don't think that was the software that had a go at your site, however, I'm just mentioning it as a concrete example of some very ruthless hacking software.

These are dangerous times. We must be cautious.