If you have more than one URL for similar content it is better to specify the canonical URL for your content.
You can read more about Canonical URL’s at the official Google Blog
vbSEO is one of the few must have plugins for vBulletin but it has one bug which has almost zero occurrence but it somehow occurred with me. Somehow I am always in the midst of things where I should not be.
Coming back to vbSEO.
If you do not use specify Rewrite Rules for vbSEO and still want to have Canonical URLs, vbSEO does not add the right canonical URL’s and adds and extra &page parameter to the urls unconditionally i.e. &page=
The Bug was in vbSEO 3.3.2 for threads, forums and group but it is rectified in vbSEO 3.5 Gold PreRelease for threads but not for forums and groups.
At Line 964 in functions_vbseo_hook.php and replace with
Apply the same at line 858 for groups.
The file line numbers are for vbSEO 3.5.0 Gold PreRelease
I have also reported the same to the support team and I am sure very soon it will be taken care off.
Further Reading …