Blank page weirdness.

[eluser]Unknown[/eluser]
Hi,

I have a problem where a blank page is returned after I make a call to a search class I have but if I go to the controller and put in a simple echo statement it all works -- here's the weirdness -- if I then take the echo statement out of the controller (i.e. put the controller back to the way it was) it STILL works.

It carries on working for me for as long as I'm on the site but if I try the next day it's back to not working. The situation occurs in both IE and Firefox.

Of course I'd be grateful if anybody could shed some light?