As of this date, I can't scroll with my scroll-wheel on this site using a late version of Chrome.
Console shows this message:
A Parser-blocking, cross site (i.e. different eTLD+1) script, https://tpc.googlesyndication.com/pagead/js/r20170508/r20110914/activeview/osd_listener.js, is invoked via document.write. This MAY be blocked by the browser in this or a future page load due to poor network connectivity. If blocked in this page load, it will be confirmed in a subsequent console message.See https://www.chromestatus.com/feature/5718547946799104 for more details.
The message was repeated several times per page-load.
I can use my scroll-wheel Just Fine(tm) on tabs open to sites besides PHP Builder. I haven't tried other Quinstreet vBulletin properties, though.