I've used PS 5.5 for years and when I make a thumb of an image so that Rendo will accept for upload, all was easy.  Just resize the image with 200 pixels max.  Usually it is around 26K and if I slide the quality from 12 to about 10 or 8 at the most it comes in under 15k for a thumbnail upload.

Now in CS3, the 200x200 file is double that size and taking it to 0 on the slider still doesn't get me under 15K. 

I've tried baseline standard, baseline optimized and progressive. 

Is CS3 just not as efficient or is there something else I should be doing?