[CMS] error message when editing or reading cms post

[rexxxy]

how do i go about fixing this. this happen now when i try to edit or view a cms post

Fatal error: Cannot use object of type vB_Legacy_Thread as array in /xxxx/xxxx/public_html/packages/vbcms/content.php(985) : eval()'d code on line 1

[Lynne]

What is on line 985 of your packages/vbcms/content.php file?
Try this:
Disable all your plugins/products except the Blog and CMS. And when I say disable them ALL, I mean all the products on the Manage Products page (except the Blog and CMS products) AND all the plugins in the Plugin Manager (except those associated with the Blog and CMS). You must do BOTH (I can't emphasize that enough). Now see if you still have the same problem.