I use Volute and unzoom : the more I unzoom, the more volutes are transparent.
At the max Unzoom, the draws with Volute disappear.
If I zoom, Volutes go back to regular transparency.
Other pens work correctly, and Volute over other pens work correctly. edit : doesn't work too
Only Volute on blank page goes wrong
System :
XP SP3 - Intel duo 2.33ghz - 2Go RAM
Nvidia 9800GT 1024MB