MP Configuration in Vista Compatibility Mode under Windows 7 Pro? (1 Viewer)

[rsbrux]

MediaPortal Version: 1.2.0RC
MediaPortal Skin: Blue3 Wide
Windows Version: Win 7 Pro
CPU Type: Intel Pentium 4 @3 GHz
HDD: Samsung HD154UI 1500GB
Memory: 3 GB DDR 400 DIMM
Motherboard: FIC P4M-915GD1-LF
Video Card: Club HD3450 256MB DDR2
Video Card Driver: 8.56.1.15 (Microsoft WDDM 1.1)
Sound Card: Realtek High Def. Audio
Sound Card AC3: no AC3
Sound Card Driver: Microsoft 6.1.7600.16385
1. TV Card: Terratec Cinergy C PCI HD CI
1. TV Card Type: DVB-C
1. TV Card Driver: 1.1.2.501
2. TV Card:
2. TV Card Type:
2. TV Card Driver:
3. TV Card:
3. TV Card Type:
3. TV Card Driver:
4. TV Card:
4. TV Card Type:
4. TV Card Driver:
MPEG2 Video Codec: ffdshow / Cyberlink
MPEG2 Audio Codec: ffdshow
h.264 Video Codec: MPC / Cyberlink
Satelite/CableTV Provider: Telezug (WWZ) Switzerland
HTPC Case: FSC Scaleo E (FIC Spectra)
Cooling: OEM
Power Supply: OEM
Remote: One For All XSight Touch
TV: InFocus TD40
TV - HTPC Connection: DVI

The 3rd or 4th time I ran MP Configuration under Win 7 Pro, Windows strongly suggested that I run it henceforth in Vista compatibility mode. It is "Run as Administrator".
Does anyone know why?
Is there any reason not to?

I am posting this here instead of the Development forum, because I don't consider this a bug.