Wrong search direction when changing date

[GoogleCodeExporter]

Hi there,
if I change the date (both in the past or the future), search for a planet, 
then get back to current date, search directions get wrong

To reproduce:
1. Use the time machine to select a date (in the past or the future, it's the 
same outcome)
2. Search for an object (I searched Mars). The directions are right
3. Set back the time to "now"
4. The circle is still present, but following the directions will bring 
nowhere. Additionally, when approaching the supposed target, the arrow changes 
direction.

I'm running version 1.6.4 on a HTC Desire S phone

Original issue reported on code.google.com by ilpelle on 29 Feb 2012 at 9:53