By the way, Shareaza 1.6 is released today!!! You shouldn't see too many issues with the unsafe files anyway. I believe what shareaza does is compare the files to SHA1 integrity. http://www.w3.org/PICS/DSig/SHA1_1_0.html . There was some reason why the files did not did not match to their hash codes and they were deemed unsafe. I believe it is fixed in 1.6. Anyway there is http://bitzi.com/ which is a meta database for files and these applications will compare the integrity of the files to what is listed in their database. Because shareaza and many of the newer releases of P2P applications download in partial files from many peers there needs to be an authentication on whether the files are complete. These are my opinions of what is happening. Download 1.6! It seems to work really well so far!

Good luck and keep sharing!