Shareaza

It should be possible to export file details, comments and other metadata to some kind of xml file in order to be able to backup such information and (re-) use it on other computers.
I think this would increase the number of ratings for files on G2 drastically.

Just to give an example: I had some months ago a library with not less than 200+ rated and partially commented files (comments on quality and content). This has all been lost during a library rescan.
And now just imagine Shareaza would back up (not only export) this data to a file and after a library rescan, known information would be readded to the library... Could you imagine the result? This would multiply the amount of available ratings on G2 by 10 or more...

Just don't clear library.

Ratings and metadata already used by other clients on network, its published as query hits and saved with downloads to other clients since version 2.4.0.0.

Library rescan does not destroy ratings.

Library always has two copies: Library1.dat and Library2.dat and its wise to backup them by third-party tools.

Rating and metadata preserving during in-library file operations was broken year ago in new file system branch, it isn't fatal so currently I postponed it (to other developers).