If you want to customise the twentyten theme, you are best to post on the WordPress.org forums for support. This forum is for BuddyPress-specific questions.
If you have a totally white page, it’s a PHP fatal error. These are logged to the php/apache log files. Unless you’ve missed them, I have no idea why they might not be appearing.
Go to the TwentyEleven theme. Remove BuddyPress. Create a page. Go to the page. Does the page load?
If it doesn’t, what’s the URL to that page? This is probably a permalink or rewrite rule problems, and creating a page is the easiest way to find out what’s going wrong.
Well, unless someone has happened to do this before and reads it, it’s unlikely someone is going to spend the time to figure it out. It’s not an easy copy-and-paste job.
BP used to need to do this back in the 1.0 days when we were on WPMU only. We’ve already removed it for 1.6 (I can’t find the commit on Trac easily, but look for the bp_core_email_from_address_filter function).
You need to show us the fatal errors. Look in your web server’s PHP log, and copy/paste them here. If you’re not sure where your log file is, contact your host and ask them to help.
It’s waiting for a response from the server. It could be the web server, or the database, or some unusual slowdown in a persistent caching layer.
How many members do you have on your site? I see you’re loading the member directory.
Based on my experience, I suggest this is likely to be the database. Log into mysql on the database via a terminal, and do a ‘show processlist;’ while loading the page in your web browser. See if you get one database query taking that amount of time.
Or, see if anything’s gone into MySQL’s slow query log if you have that enabled.
