Black fields on the sides look really bad
.
Lol yeah, I couldn't think of a work-around coz I'm using a 'panoramic scene' image from the 2000 Ghibli calendar rather than cropped characters or vector images. It was a choice between black on the sides or black in the middle:

This looks worse I think... too much space under that roof 
Btw I was looking to do a Ghibli banner as there doesn't seem to be a single one on BakaBT
Ps Just in case the mods like it
:
The character: Tanukis from Ghibli's Pom Poko
My tracker: ghiblike
hmmm, this layout looks a little better, but it won't work too well because of the site buttons on the right. the left side is probably ok...
TBH if you are going to do a scene banner like this, I think you should try and make it more like Isil's and V1gg3n's spice and wolf banners or Isil's mushishi banner or the Bokusatsu Tenshi Dokuro-chan banner that carmesim175 did on the main banner page. That is what i would suggest doing - put the image on a white bg, orient the whole picture to the left and then use a fade or blend on the right edge. then put all the text to the right.
Or if you really want the text in the center then I'd still go with the white bg, make the text a little smaller, move both images in a bit and and fade the edges like in the banners I mentioned, so they blend in smoothly, and don't look all blocky, like the one one the black bg does now...you could basically use the one you have here, and just move things in and blend the outer edges into the white bg to get rid of all the space under the roof.
also I'd leave the BakaBT text the normal colors and sizes, Or if you want to use red, then you might change the "anime community" to the same red as the "happy holidays" and leave the "bakabt" white...I guess you could use three colors and keep the gold, but I wouldn't advise using colored shadows on the letters...
well, there it is...I'm hardly an expert but that is what I'd do.. ^_^