[pen] Giving this some thought I found myself going into Mariella mode, namely that it's probably not the drinking that's the problem, but it's the person that's the problem. You seem to have reached this conclusion independently, so I'll just shut up and let you get on with your quest.
[rab] But of course! Hm. Looks like you might need a version with the same grey background, or perhaps a transparent gif version. Will see what I can do this week.
The version above is supposed to be a transparent PNG, so it may be the case that your browser doesn't support them. (I know this to be the case for at least one version of Internet Explorer on Windows, for example).