On our sever (1.3.2) we had a problem with case differeneces in the filename causing an exception (CSP-637).
files with 'Drawing.png' and 'drawing.png' were attached. Attempting to delete 'Drawing.png' caused an error.

While this seems to work ok on 1.4dr4, someone look in the attachments directory, and be sure a misnamed directory is not hanging around.

Steps I did to try to reproduce it:
-files with 'Drawing.png' and 'drawing.png' were attached
-showed up as a version. OK.

• deleted.
• files 'drawing.png' wasattached
• manual rename to 'Drawing.png'
• added 'drawing.png'
• two different files showed up
• deleted 'drawing.png'
  both attachments disappeared.

test page was
http://confluence.atlassian.com/x/18YB