Maverick 64Bit Desktop Edition corrupts files on samba network shares

I can always reproduce the bug, on any samba share, even on shares that reside on the same machine:

In Nautilus I right-click on a folder and chose "file sharing options" to make it a writable share.

Then, again in Nautilus, I navigate to "network" and mount the share by clicking on it and supplying username and password.

I created a new file on the share "sample.txt" with the following content:
01 sample line of text
02 sample line of text
03 sample line of text
04 sample line of text
05 sample line of text
06 sample line of text
07 sample line of text
08 sample line of text
09 sample line of text
10 sample line of text

Then I removed the lines 02 up to 05 from the file and hit save. Editor shows:
01 sample line of text
06 sample line of text
07 sample line of text
08 sample line of text
09 sample line of text
10 sample line of text

When I reopen the file the new content is:
01 sample line of text
06 sample line of text
07 sample line of text
08 sample line of text
09 sample line of text
10 sample line of text
07 sample line of text
08 sample line of text
09 sample line of text
10 sample line of text

I tried several editors, several servers providing SAMBA shares (Ubuntu Hardy, Windows Vista, and my Maverick notebook)
The result is always the same.

A very, very nasty bug.

See also
https://bugs.launchpad.net/ubuntu/+source/samba/+bug/660747
I first tought it was a samba problem, but using the old kernel
Linux 2.6.32-25-generic #44-Ubuntu SMP Fri Sep 17 20:05:27 UTC 2010 x86_64 GNU/Linux
from Lucid - the bug is gone.

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: linux-image-2.6.35-22-generic 2.6.35-22.34
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.35-22.34-generic 2.6.35.4
Uname: Linux 2.6.35-22-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC268 Analog [ALC268 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: franco 2395 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf0500000 irq 46'
   Mixer name : 'Realtek ALC268'
   Components : 'HDA:10ec0268,1025011b,00100003 HDA:11c11040,1025011b,00100200'
   Controls : 16
   Simple ctrls : 10
Date: Sun Oct 17 21:55:47 2010
HibernationDevice: RESUME=UUID=ebc5a6f9-31bb-4ea5-a15c-af3057bb2081
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
MachineType: Acer, inc. TravelMate 6292
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcCmdLine: BOOT_IMAGE=/vmlinuz-2.6.35-22-generic root=/dev/mapper/ubuntu-root ro quiet splash
ProcEnviron:
 LANGUAGE=de_DE:de:en_GB:en
 PATH=(custom, user)
 LANG=de_DE.utf8
 SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.38
SourcePackage: linux
dmi.bios.date: 03/03/2008
dmi.bios.vendor: Acer
dmi.bios.version: v1.3601
dmi.board.name: Victoria
dmi.board.vendor: Acer, Inc.
dmi.board.version: Not Applicable
dmi.chassis.type: 1
dmi.chassis.vendor: Acer, Inc.
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnAcer:bvrv1.3601:bd03/03/2008:svnAcer,inc.:pnTravelMate6292:pvrNotApplicable:rvnAcer,Inc.:rnVictoria:rvrNotApplicable:cvnAcer,Inc.:ct1:cvrN/A:
dmi.product.name: TravelMate 6292
dmi.product.version: Not Applicable
dmi.sys.vendor: Acer, inc.