Binary package hint: compiz
The problem seems to be the same as this one https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/155493. (The last comment told to open a new bug if the problem came up again.)
Anyway in short: When having Compiz on ("Normal" in Visual Effects in the Appearances window), windows over video playing in Totem (Banshee or VLC) have a black border around them (probably from the window shadow that Compiz makes).
ProblemType: Bug
Architecture: i386
CheckboxSubmission: afbf78cdce238f9efb19dd2b55117606
CheckboxSystem: 3799a2aef00976bb92c862aba4af6312
CompizPlugins: [core,move,resize,place,decoration,animation,ccp,dbus,mousepoll,gnomecompat,png,svg,imgjpeg,text,commands,neg,video,wall,snap,scale,scaleaddon,expo,staticswitcher,regex,resizeinfo,workarounds,ezoom,vpswitch,extrawm,fade,session]
Date: Wed Nov 4 13:26:11 2009
DistroRelease: Ubuntu 9.10
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
Lsusb:
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Notebook SAM2010
Package: compiz 1:0.8.4-0ubuntu2
PackageArchitecture: all
PciDisplay: 01:05.0 VGA compatible controller [0300]: ATI Technologies Inc RS482 [Radeon Xpress 200M] [1002:5975]
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.31-14-generic root=UUID=33512493-51eb-4b7b-8614-7bacca211b43 ro splash quiet splash
ProcEnviron:
LANG=da_DK.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-14.48-generic
RelatedPackageVersions:
xserver-xorg 1:7.4+3ubuntu7
libgl1-mesa-glx 7.6.0-1ubuntu4
libdrm2 2.4.14-1ubuntu1
xserver-xorg-video-intel 2:2.9.0-1ubuntu2
xserver-xorg-video-ati 1:6.12.99+git20090929.7968e1fb-0ubuntu1
SourcePackage: compiz
Uname: Linux 2.6.31-14-generic i686
XorgConf: Error: [Errno 2] No such file or directory: '/etc/X11/xorg.conf'
dmi.bios.date: 09/18/2007
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: A1058AM7 V7.23
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: SAM2010
dmi.board.vendor: MEDION
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 10
dmi.chassis.vendor: MICRO-STAR INT'L CO.,LTD.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrA1058AM7V7.23:bd09/18/2007:svnNotebook:pnSAM2010:pvr1058:rvnMEDION:rnSAM2010:rvr:cvnMICRO-STARINT'LCO.,LTD.:ct10:cvrToBeFilledByO.E.M.:
dmi.product.name: SAM2010
dmi.product.version: 1058
dmi.sys.vendor: Notebook
system: distro = Ubuntu, architecture = i686, kernel = 2.6.31-14-generic
Like the other bug poster, I am unable to get the video picture on a screen capture so I'll probably take a photo sometime soon instead to illustrate.