Links showing with [1] around them

Hi everyone.

I’m a first time poster here, but have come across a problem I’ve not been able to find an answer for anywhere.

When I put a link on my site, it keeps putting [1] around it, for example:
[1] http://www.sherbertlemonuk.com [1]

Here is a link to show you what I mean, check out just under the image:
http://www.sherbertlemonuk.com/2010/09/gazette/

Any help is greatly appreciated.

Thanks,
Craig