I've installed beta5 (not the package) and got the blank screen again. Did this before for beta 4 and reinstalled everything and it worked. However with this install, I have other modules installed where I don't want to have to reinstall everything.

When I delete the Ubercart folder, it will work. Once I put it back, the whole site gives this error:
Fatal error: Call to undefined function uc_product_node_info() in /var/www/vhosts/domain.com/httpdocs/modules/ubercart/uc_repeater/uc_repeater.module

I don't know if I did the sequence right this time. Last time I had to install a few parts of the module at a time.

Tried the following memory solution and memory is at 50M and blank page is still there.
http://www.ubercart.org/forum/support/2603/cannot_install_ubercart