Thanks. Like i said, it may be totally unrelated and just coincidental because i did have a few instances before installing, but it did seem to happen much more frequently after installing and never since deleting from the desktops. It's a shame, i really love this one.
The disappearing act was never consistent either - once, for instance, i was playing with desktop clock settings and everything went, and another time my browser froze and crashed and when i did 'end current task' again the widgets had gone.