Scrolling up-down in channel list misbehaves when browsing before current time in TV-guide.



h4. Steps to Reproduce
To reproduce:
1. Open TV-guide.
2. Scroll back 5 or so hours in TV-guide (i.e. scroll back to 15.00 if current time is 20.00).
3. Click down or up repeatedly to go up and down in TV-guide.
4. Observe that some channels are skipped. Observe that the selected program jumps to end of "current time-view". Observe randomly occurring delays (1 second or so) when moving cursor.

h4. Additional Information
Logs show nothing about moving around in TV-guide, so no help there. Tested with SVN 24717, but occurs with older SVN as well. Issue occurs on both my htpc (W7-32bit) and dev pc (W7-64bit), and my previous dev pc (XP & SVN24477).

Confirmed by elliottmc