Upgraded to 4.1.1 (receiving URL errors)

[Chmura]

I just upgraded from 3.8.2 to 4.1.1
After I upgraded I started receiving this message whenever I wanted to go into a forum

Invalid Forum specified. If you followed a valid link, please notify the administrator

my URLs Looked like this = /forum/forumdisplay.php?2-General-Chat
For some reason forumdisplay.php was placed there.
To fix this I went to Friendly URLs and changed to standard.
Now my URLs look like this = /forum/forumdisplay.php?f=2

There is a problem with the threads though
If I try going inside a thread this is the error I get

Database error in vBulletin 4.1.1:

Invalid SQL:

(SELECT 'package' AS classtype, package.packageid AS typeid, package.packageid AS packageid,
package.productid AS productid, if(package.productid = 'vbulletin', 1, product.active) AS enabled,
package.class AS class, -1 as isaggregator
FROM package AS package
LEFT JOIN product AS product
ON product.productid = package.productid
WHERE product.active = 1
OR package.productid = 'vbulletin'
)

UNION

(SELECT 'contenttype' AS classtype, contenttypeid AS typeid, contenttype.packageid AS packageid,
1, 1, contenttype.class AS class , contenttype.isaggregator
FROM contenttype AS contenttype
INNER JOIN package AS package ON package.packageid = contenttype.packageid
LEFT JOIN product AS product ON product.productid = package.productid
WHERE product.active = 1
OR package.productid = 'vbulletin' );

MySQL Error : Illegal mix of collations (latin1_general_ci,IMPLICIT) and (latin1_swedish_ci,IMPLICIT) for operation '='
Error Number : 1267
Request Date : Monday, January 31st 2011 @ 05:34:38 PM
Error Date : Monday, January 31st 2011 @ 05:34:38 PM
Script : http://www.******/forum/showthread.php?t=2167
Referrer : http://www.******/forum/general-chat/
IP Address : ****
Username : ****
Classname : vB_Database
MySQL Version : 5.1.51

How do I fix this? Does anyone know?
When I go into General Chat on top it doesn't show "/forumdisplay.php?f=2" but "/general-chat/"
How can I get it to show /general-chat/ when I hover over the Forum and the Thread /general-chat/thread-name/?

All my plugins have been disabled before the upgrade and now.
I had vbseo installed before the upgrade if that matters, but it's disabled.