Unable to reactivate screen after power save activated

I'm using an EEE PC 1000 with Easy Peasy 1.5 freshly installed over the default OS (dev1a formatted before installationn of 1.5).

When you leave the laptop alone and power save is activated, the screen powers itself off (as expected). Once that has happened, you cannot reactivate the screen display by mouse pointer movement, or by pressing any keys (e.g. Return, tab, Home key, arrow keys, etc). The only way to "fix" this is to power down the laptop and restart it.

EDIT: This bug does not happen all the time for me any more. At the time of bugging this it was happening all the time, but I've not seen this occur at all in the last month or so. I've not changed anything significantly, but perhaps one of the automated Synaptic Package Manager updates has fixed this issue incidentally.