[Qgis-user] Problem to setting the dimension symbol Point - Windows 7 and Xp

[Preda Mauro]

In windows (7 and Xp) when I open any points QGIS default theme shows me the shot points, with acceptable size but ... just open the window to create and / or modification of the issues, the dot size is set to 0.00000, and you can not change it.
The version of QGIS is 1.5.0
It is not a problem of scale or projection!

thanks !

Mauro