Scythe42's D3D reworks/fixes were not tested on Windows XP.
As it turns out, there are a few issues.
1. [mm, Sebastiii] ActivateWindow() exception.
2. [mm] Hang on switch between windowed and FS mode if media playing.
3. [mm] Hang on resize window while playing TV if haven't previously resized the window.
4. [mm] When switching to full screen, rendering of UI in full screen mode depends on previous window size.
5. [mm] 16:9 TV stretched to 16:10. Could be general issue.
6. [Sebastiii] Pictures/videos issue.
7. [mm] MP fails to work after standby resume. Device recovery fails.

Most of these are in some way related to device loss/recovery scenario failures.