I'm finally able to reproduce (at least one) the instance of the repainting problem.
Start a CD rip
Then start a video playing on the secondary monitor
While it's playing, right click and "Detach Display"
You can then do whatever with MC on the primary display
Then, minimize MC and wait for the CD rip to finish (Minimize to tray)
When the rip finishes, restore MC.
The pane/detail area will be whatever was behind MC (not processing WM_PAINT?)
Media Center 13.0.161 Registered -- D:\Program Files\J River\Media Center 13\
Microsoft Windows XP 5.1 Service Pack 3 (Build 2600)
AMD Unknown 3002 MHz MMX / Memory: Total - 2096 MB, Free - 1299 MB
Internet Explorer: 7.0.5730.11 / ComCtl32.dll: 5.82.2900 / Shlwapi.dll: 6.0.2900 / Shell32.dll: 6.0.2900 / wnaspi32.dll: N/A
Ripping / Drive E: LITE-ON DVDRW LH-20A1L Mode:ModeSecure Type:Auto Speed:Max
Digital playback: Yes / Get cover art: Yes / Calc replay gain: Yes / Copy volume: 32767
Eject after ripping: Yes / Play sound after ripping: No
Burning / Drive E: LITE-ON DVDRW LH-20A1L Addr: 0:1:0 Speed:48 MaxSpeed:48 BurnProof:Yes
Test mode: No / Eject after writing: Yes / Direct decoding: Yes / Write CD-Text: Yes
Use playback settings: No /
Portable Device Info
Removed devices: CANON (G:),CANON (F:),MOULTRIECAM (F:)
Interface Plugins:
last.fm
Library Server (Active)
TiVo Server
UPnP Server