On my WP install (www.renolanslide.com) I am currently running 2.1.2 with the following plugins: akismet, flickr photo gallery, zenpress, and wp-contactform.
Up until recently, I had akismet, flickr, and zenpress all working fine. I added the new wp-contactform plug, and it worked fine as well, except that my main flickr photos/ page became a blank page.
All plugins still work, and still have options in the admin area. The flickr and zenpress plugins still have their writing integration modules, and I can even access the dynamic image pages for individual images and sets. It is only the main album display page that is getting the blank page.
If i disable the newly added wp-commentform plugin, everything goes back to normal. All plugins work fine if activated separately.