downloading mail attachment problem

[drew911d]

I can't figure this out. When I try to download a mail attachment, like a pps file I get a file called mailatt.bin. It's about the same size as the original file, but I have no way of viewing it as a pps file. This is with the yahoo mail app as well as the browser, before and after froyo. I was able to download the files correctly with my tp2.

Has anybody seen this?