CiviEvent Participant View and CiviMember Membership View: Printer-friendly page is BLANK when printed

Our print.css was setting display:none for div's with class="form-item" - so any "view" page which was surrounding by div of this class would be "hidden". There was also a missing close bracket on a <table> tag in ParticipantView.tpl and missing <tr> tags in Event/Form/Selector.tpl and Contribution/Form/Selector.tpl

For the 3.1 commit I modified print.css to NOT hide form-item div's but instead to hide elements with button or buttons class - since the INTENT was to suppress form action buttons from the printer output. I added "buttons" class to several of the view pages as well which cleans up the printer output nicely.

— Original Post ----
Found problem with printing in CiviEvents. When going to list of participants, then "view" for an individual participant's record, the contact information screen appears fine, with contact information and profile fields. The "printer-friendly view" icon shows a printer friendly page with the participant's information, but actual print sent to printer or pdf is a blank page. This happens in IE and FF.