As mentioned previously, I have only manage to make the post having the same length across all the browsers I use (IE7, Firefox 3.0, Safari 3.1, Chrome 0.2). I can't seem to get rid of that empty space mentioned without facing positioning problems in Firefox.
I don't know if I should apply this theme to the Japanese version of the anime blog due to problems faced and the fact that this language requires larger-sized fonts, but I have already applied the background images and colours to it and it looks better than previously.
As some of the widgets contain tables of unspecified width or elements like images that are percentage-based (%), the height of area where these widgets takes up varies.