UPDATE
I just uploaded version 2.34 to http://www.zen-cart.com/index.php?ma...roducts_id=272
(So it will probably will be available soon)

Changes compared to 2.33 are minor, only the css_button() function has changed (It looks for the existence of a class in $parameters now, and if found that class will over ride the css buttons class. And some cleanup is done.).

To upgrade form 2.33 to 2.34 just replace the css_buttons.php function file.

Tested on 1.3.6 (and 1.3.5)