facebook connect bug

hello
my site use vbulletin 4.1.2
and vbseo 3.5.2

this bug occur only in showthread if:
1.the link of thread has arabic characters
2.when guest try to login through facebook connect when he is on the showthread
3.when he using firefox only, this bug will not exist if guest is using ie8
4.when Disable "urlencoding" in URLs ? is yes, if this option is no ,the bug will not exist

when all above present the guest when click in facebook connect in showthread he will go to the the thread again without logining

any hep or advice on this

my site is utf-8 encoding
after full test
this issue appear when any url :tags ,showthread or any page contains non-english word "my site using arabic"
and user using firefox or google chrome
with vbseocp option : disable "urlencoding" in URLs ? is yes, if this option is no ,the bug will not exist

users then can not login or register through facebook connect when they visit it as guest

but if user login through vbulletin then visit any page like above he can use facebook connect to connect his account with facebook account !

plz help me by fixing this issue

where is the support ? 5 days no one answer!!

Hello,

It has come to our attention that you are utilizing vBSEO in 6 different sub-domains. According to our End User License Agreement (vBSEO™ - End User License Agreement (EULA)), you must purchase a separate vBSEO license for each vBulletin instance you have in your server, in which you want vBSEO installed on.

You won't receive further support unless you explain what's going on throughout a support ticket.

no that is not Right
i use vba dynamic not vbulletin instances and also vba dynamic use its seo :
vBadvanced - Products

so i need you to fix the issue and plz when you give warn try to read carefully the site we use vba dynamics with its seo!!

As asked please create a support ticket as when i check your site there are different forum installations within different subdomains. This issue should be discussed within a support ticket.