Hi! I was worried about this as well when I got my white jumbo. I have had no problems whatsoever wearing them with my Rock & Republics! R&R jeans come with a "warning" tag about color transfer onto lighter colored clothing. I haven't had any problem with my white jumbo on denim, or any colored clothing for that matter.
eeps! it was my R&R VB crown jeans that stained my dk white flap! i have to send it to have the denim color transfer removed soon! shin, did you see the color transfer on the corners of the back pocket of my flap that day? :s