BuddyPress.org

I have been testing buddypress. The new user registration goes smoothly. If the end user goes to work on the blog they created from the drop down menu (assume default buddypress theme), when they go to return to main domain they receive the WSOD. It appears to be a cookie issue: after working on .com/username/wp-admin they cannot return to the high-level domain.

The following solution only appears to work part of the time:
http://premium.wpmudev.org/forums/topic/blank-page-for-wp-adminblogphp

FYI: the multi-site function is set as subdirectory.

There is a second issue that may be related to the first. After the end user publishes a post, it does not appear in the blog stream.

Any help would be appreciated!