(posted here because of traffic)
i have never liked the way that those programs handle/display files .
the quality on gifs is not so hot and they run slow , the jpegs look "flat" and the color shift is noticable .
i went looking for a replacement viewer to use outside of photoshop or GIMP ...
i found this :
http://www.irfanview.net/
i gave it a try ... it works ! gifs run at full speed and better quality . the jpegs track close to photoshop .
the types of files it will open is amazing ... dl the accessory pack that is available .
of course , i chose not to install the google tool bar ... clean , no problems .