I found a solution for the thread titled, "BAD PARAMETER Error when Deleting Pages in Acrobat".

To fix the "Bad Parameter" issue and maintain bookmarks do the following (I have Adobe Actobat 9 Pro):

1) Open the corrupted file

2) Click File

3) Then Combine

4) Then Merge Files into a Single PDF

5) The corrupted file should show up in the Combined Files screen

6) Add any other PDF file that isn't corrupt, prefferable just one page (move the new file to the bottom)

7) Hit Combine Files

8) Follow any prompts and save the new file.

9) Open the new file and delete the new page(s) and any new bookmarks.

Sorry for posting it here but I couldn't figure out how to reply to the original post.