Originally Posted by
-jk
Think of a file as a being analogous to a book, with a bunch of individual pages. File systems keep track of each page individually. When you delete a file, each page is flagged as empty, and can be reused by another file.
If you delete a large file - one with many "pages" - you leave a lot of empty pages that can, and will, be overwritten with new files. Just using your computer, and especially an internet browser, creates new files, filling those (supposedly) empty pages with new data.
Had you immediately tried to recover them, chances are you would have recovered them. Now, though, the corrupt ones are probably missing crucial bits, and will never work properly.
So, yes, you're hosed.
-jk