Recent Dapper upgrade issues...

[Gabriel Dragffy]

Installed Dapper about 1 week ago, each day I download updates and install them using aptitude dist-upgrade. For the last several days the kernel image has had some kind of error. I don't know what the error means, what causes it  or what the solution might be....

The following packages will be upgraded:
  linux-image-2.6.15-23-686
1 packages upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 0B/22.4MB of archives. After unpacking 32.8kB will be freed.
Do you want to continue? [Y/n/?] y
Writing extended state information... Done
(Reading database ... 101320 files and directories currently installed.)
Preparing to replace linux-image-2.6.15-23-686 2.6.15-23.35 (using .../linux-image-2.6.15-23-686_2.6.15-23.39_i386.deb) ...
The directory /lib/modules/2.6.15-23-686 still exists. Continuing as directed.
Unpacking replacement linux-image-2.6.15-23-686 ...
dpkg: error processing /var/cache/apt/archives/linux-image-2.6.15-23-686_2.6.15-23.39_i386.deb (--unpack):
 trying to overwrite `/lib/modules/2.6.15-23-686/kernel/drivers/acpi/sony_acpi.ko', which is also in package sony
dpkg-deb: subprocess paste killed by signal (Broken pipe)
Searching for GRUB installation directory ... found: /boot/grub
Testing for an existing GRUB menu.list file ... found: /boot/grub/menu.lst
Searching for splash image ... none found, skipping ...
Found kernel: /boot/vmlinuz-2.6.15-23-686
Found kernel: /boot/vmlinuz-2.6.15-23-386
Found kernel: /boot/memtest86+.bin
Updating /boot/grub/menu.lst ... done

Errors were encountered while processing:
 /var/cache/apt/archives/linux-image-2.6.15-23-686_2.6.15-23.39_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
A package failed to install.  Trying to recover:
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