Pattern fill messing up text.

[Boh]

Haven't used pattern fills much, thought I'd try them. Looks great on the screen in vectorworks, also looks great when exported to pdf, but when I print the pdf it messes up any overlaid text. This is a scan of a printed hardcopy:

 

 

This is what it should look like:

 

I've discovered that if I have "Rasterise text" checked" in the export pdf dialogue then this sorts out this little problem.

The next question is how do I make this the default PDF export option so I don't have to remember to have adjust this setting everytime I export?

Thanks in advance!