I was testing out this plug-in, and noticed something quite strange. If you save a file (.wdp) in which about 73% or more of the pixels are transparent, saving it at a 32-bit depth at 99% quality results in a larger file size than saving it at 100% quality. This effect also seems to amplify as more transparent pixels are added. So, for example saving a 400x300 resolution file where 73.333% the pixels are transparent results in less than a 1024 byte difference, while saving a completely transparent 400x300 file at 100% and 99% quality result in 736 and 33,028 byte file sizes, respectively. That a 44.875 times bigger file size, at less quality.