Here’s my apex code, copied from the Account redirect page which works fine:

<apex:page standardController=“Opportunity” action=“{!redirect}&actiontype=View&objecttype=Opportunity” extensions=“skuid.Redirects”/>

It’s not a page assignment issue, it just doesn’t even try to do any kind of redirection when you look at an opportunity.

Like for Accounts we see in the URL: /001E000001BBgso?nooverride=1&sfdc.override=1

But for opportunities it’s still just /006E000000WHJq7