cdimage.debian.org presents different faces for "ftp" and "http" access

[Rick Thomas <rbthomas55@pobox.com>]

Pointing my browser at
   <http://cdimage.debian.org/cdimage/daily-builds/daily/arch-latest/ 
powerpc/iso-cd/>
redirects me to
   <http://ftp.acc.umu.se/cdimage/daily-builds/daily/arch-latest/ 
powerpc/iso-cd/>
which contains
> Index of /cdimage/daily-builds/daily/arch-latest/powerpc/iso-cd
>
> Icon  Name                                             Last  
> modified      Size  [DIR] Parent  
> Directory                                                      -
> [   ] MD5SUMS                                          22-Oct-2006  
> 04:02  143
> [   ] debian-testing-powerpc-businesscard.iso          22-Oct-2006  
> 04:00   54M
> [   ] debian-testing-powerpc-businesscard.iso.zsync    22-Oct-2006  
> 04:00  190K
> [   ] debian-testing-powerpc-netinst.iso               22-Oct-2006  
> 04:01  166M
> [   ] debian-testing-powerpc-netinst.iso.zsync         22-Oct-2006  
> 04:02  292K
>
> Apache/2.2.3 (Unix) Server at ftp.acc.umu.se Port 80


but pointing my browser at
   <ftp://cdimage.debian.org/cdimage/daily-builds/daily/arch-latest/ 
powerpc/iso-cd/>
which contains
> Index of ftp://cdimage.debian.org/cdimage/daily-builds/daily/arch- 
> latest/powerpc/iso-cd/
> Up to higher level directory
> File: MD5SUMS 	1 KB 	10/25/06 	3:53:00 AM
> File: debian-testing-powerpc-businesscard.iso 	55596 KB 	10/25/06 	 
> 3:51:00 AM
> File: debian-testing-powerpc-businesscard.iso.zsync 	191 KB 	 
> 10/25/06 	3:51:00 AM
> File: debian-testing-powerpc-netinst.iso 	170560 KB 	10/25/06 	 
> 3:53:00 AM
> File: debian-testing-powerpc-netinst.iso.zsync 	292 KB 	10/25/06 	 
> 3:53:00 AM

Note the difference in dates of the .iso files...

Something strange is happening.  Is it a Halloween prank?

Rick