WordPress MU

First of all, I am awaiting php error logs from the network team where I work so those are not immediately available (they leave earlier than i do). Here is the problem:

I am the blog administrator for blog network of about 100 blogs. We are currently running WPMU 2.7.1. A few weeks ago we upgraded to 2.8.1 and everything went haywire. There were multiple bugs and compatibility issues so we reverted to 2.7.1. Since then I haven't noticed any major problems until today. I created several blogs and each of them have a blank FrontEnd and admin screen. This is only a problem with newly created blogs.

I have removed all plugings and mu-plugins with no results.

I can access the "edit" screen of the blog in the "blogs" table in the admin of an existing blog just fine, but the actual backend is a blank screen.

I will be getting error logs and MySQL info over the next day or so but was hoping that someone has seen this issue before.

This is a subdirectory installation, you can find one of the problem blogs here http://blog.newsok.com/test4

Check the database and see if it created all the tables. Ran into a similar issue.

Just checked and new tables are being created:

wp_198_comments

wp_198_links

wp_198_options

wp_198_postmeta

wp_198_posts

wp_198_term_relationships

wp_198_term_taxonomy

wp_198_terms

Admin still blank.

This may be a related issue, when i try to install new plugins through the admin console I get the following error

"Could not create directory: /var/www/html/blog/2.7.1/wp-content/upgrade/wp-recaptcha296

Installation Failed"

Okay, looks like it was entirely related to the default theme. I went through the blog options for the blank blog using the 'edit' link in the blogs table and compared it to a functioning blog. I made manual changes to the theme name and registration settings so that the broken blog was exactly the same as a functioning blog. When I updated we were back in business.

I then deleted the "default" theme out of the themes directory and moved a new default theme in, created a new blog and now everything is working fine. It appears that there was an issue with the initial default theme that was causing the blank pages.

I didn't think that the theme would affect the admin, but there you have it.

Thanks for the response Andrea_r.

What plugins do you have activated sitewide, or in mu-plugins?

The install new plugins error is a folder permission issue.

Had the network team change the permissions on the folders and all seems to be working now. A lot of little problems popped up when we downgraded. Thanks again.