Originally Posted by fonejunkie
Go to OPTIONS / STATUS and tell us what your FILE FREE is... the BB OS does delete some items (most notably phone logs, SMS, etc) when your memory gets critically low. It's possible that stuff like "saved searches" is included in the stuff that is "deletable" in this case... just a thought.
That is right, when your memory is low, it usually deletes stuff. Also, try clicking last, which goes back to your last searched item.