"live" preview for browsing in TV guide? (1 Viewer)

[rsbrux]

TV-Server Version: 1.0 RC3
MediaPortal Version: 1.0 RC3
MediaPortal Skin: Blue3
Windows Version: XP SP3 MCE RU2
CPU Type: Intel Pentium 4 @3 GHz
HDD: Samsung HD501LJ 500GB
Memory: 3 GB DDR 400 DIMM
Motherboard: FIC P4M-915GD1-LF
Video Card: Club HD3450 256MB DDR2
Video Card Driver: ATI Radeon 3450 8.493.0.0
Sound Card: Realtek High Def. Audio
Sound Card AC3: no AC3
Sound Card Driver: 5.10.0.5319
1. TV Card: Hauppauge HVR-1300 MCE
1. TV Card Type: hybrid (only analog section in use)
1. TV Card Driver: 2.119.25023.0
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: ATI
MPEG2 Audio Codec: Dscaler
h.264 Video Codec: ATI
Satelite/CableTV Provider: Telezug (WWZ) Switzerland
HTPC Case: FSC Scaleo E (FIC Spectra)
Cooling: OEM
Power Supply: OEM
Remote: PDAwin.com TVRC 5.5
TV: InFocus TD40
TV - HTPC Connection: DVI

MP shows a small "live TV" preview in the lower left of the screen in the TV Guide view.
ISTR that this preview used to change to the highlighted channel when scrolling through the guide.
In 1.0 it continues to show the last selected channel.
How can I get an inset preview while browsing channels in TV Guide?
If I select (click on) the channel, MP immediately switches to full screen.