Avant Browser Printing Issue

[kerflot]

SB v3.76
Win7 Home Premium x32
Avant Ultimate 2012 build 193 (latest of this date).

This only happens when I run Avant Sandboxied.
I have Avant set up in IE9 mode.

It also happens only when I am on a "https:" page and click on a "Print" button. More specifically on my Bank's website.

What should happen is another window should open followed by the Print dialogue box. This "other" window then stays open until I close it.
What does happen is the "other" window that opens stays open briefly then closes, no Print dialogue box.

Any ideas?