For a general discussion of Toppys spontaneously rebooting check out the oztoppy wiki: http://oztoppy.wikidot.com/pvr-restarts
Thanks Ian,
I notice in the last paragraph of the "IceTV EPG cause rebooting" section you mentioned:
it is the red button at the bottom; looks like the Record button rather than the Red Function Button. I'm not sure if you are saying it looks like the record button but actually is the F1 button, or if you are saying you believe it is the record button.
The 'Reset EPG Data' button is the Red F1 function button. When you press the red F1 button you get a popup 'yes /no' confirmation box. If you answer yes you should then get the 'login successful' message (and maybe a short freeze followed by one reboot).
The only way I can visually tell which button the icon refers to is by looking at the 2 red button icons at the bottom of the EPG. The red, green and yellow function buttons are shown as a coloured dots. The record button is shown as a black square with a red dot inside.