I am not the original script author, and I have tested this on exactly one album so far. But it's a really simple change you can all make yourselves and report any problems and maybe I'll post an updated version.
Go to the directory where you installed the script originally. Make a copy of any script you're changing (either move it to a new folder or you can just rename the one you change as BETA or something).
This is for the "VGMDB Search by Album" version 0.4 originally dated Jan 2 2013.
Open your favorite text editor. On line 88 you should see a section "coverurl". We're going to change that section down to where the comment #set coverurl is. Replace with this block:
# Coverurl outputto "coverurl" findline "id=\"coverart\"" findinline "background-image: url(" if "'" movechar 1 sayuntil "'" endif # set "coverurl"
Save the file. You don't need to restart mp3tag if it's already running, but do at least cancel any open dialogs.
If you find a non-working example, please include the album title, the URL to find it at VGMDB, and a brief description or screenshot of what fields you are getting and what fields are blank.