1.95.4 slow with pentax pef K10D

[Guest]

I have camera raw set to 'thumbnail'. The fullscreen viewer is rather slow for pef files. But Nikon nef raws seem mostly fine. Is it not able to use embeded thumbnails from pef to speed up?
It's read from HDD

[xnview]

Could you send me a sample?

[bugmenot]

I've found that nef files load quicker than pef.
Also, nef files are slower than the nikon viewer, maybe they use some embedded jpg to preview.