Problem with Vbulletin 5.1.2 RC1 and possibly RC2?

[kehindelawal]

i upgraded my site to vbulletin 5.1.2 rc1 and my site became inaccessible. The browser that does the installations retains some access (cant log into Admincp) but attempting to reach my site via another browser is simply impossible.
i am yet to try rc2 but i am sensing the same error might be there.

i think the problem may be in this line in htaccess in vb folder that does not seems to reference some css correctly, especially if the installation was not done in the root of your server.

RewriteEngine On

#In some cases where you have other mod_rewrite rules, you may need to comment out the following line
#and change it to match your folder name. This resets the other mod_rewrite rules for just this directory
#If your site was [URL="http://www.example.com/forum"]www.example.com/forum[/URL], the setting would be /forum/
#RewriteBase /

# Send css calls directly to the correct file VBV-7807
[COLOR=#FF0000][SIZE=14px]RewriteRule ^css.php$ core/css.php [NC,L][/SIZE][/COLOR]

# Redirect old install path to core.
[COLOR=#FF0000]RewriteRule ^install/ core/install/ [NC,L][/COLOR]

# Main Redirect
RewriteCond %{REQUEST_URI} !\.(gif|jpg|jpeg|png|css)$
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?routestring=$1 [L,QSA]

# Because admincp is an actual directory.
RewriteRule ^(admincp/)$ index.php?routestring=$1 [L,QSA]

Am not sure exactly what the problem is but i did be glad if anyone can help. Thanks.

the error i get in another browser when i try to reach my site is this:
Critical Error

We are currently experiencing technical difficulties. Please check back in 24 hours.

[kehindelawal]

Cant anyone one pls be more clearer as per the instruction in comments in the first few line of the codes above. i have another mod_rewrite rule in the htaccess of the root of the website (NOT ROOT OF VB FOLDER). This rule is as per instruction for creating homepage and redirection if you happen to install vb in a subfolder. This is the rewrite code

RewriteEngine on RewriteCond %{HTTP_HOST} ^yoursite\.com$
RewriteRule (.*) http://www.yoursite.com/$1 [R=301,L]
RewriteRule ^$ forum/home [L]

The instruction is here

[Mark.B]

In the vB .htaccess file uncomment this line and change it to reflect the location of your forum.

#RewriteBase /

So if your forum is installed in /forum:

RewriteBase /forum/

[kehindelawal]

i have learnt a valuable lesson in this...When the nerdy but (sometimes jackass for providing little or no heads up/documentation) guys at vbulletin push up a new version Never, Never upgrade without first running a test on my local copy. That step may just save you heartaches and many worries.

[kehindelawal]

In the vB .htaccess file uncomment this line and change it to reflect the location of your forum.

#RewriteBase /

So if your forum is installed in /forum:

RewriteBase /forum/

Thanks a lot.