New "Panels page is going to be viewed" Rules event

We are using Rules to generate a custom breadcrumb trail. We're using Panels 3 and OG 6.x-2.0-rc3, the newest versions of Rules and Token.

We are able to create a Rule that generates a correct breadcrumb trail for Group Posts using the following settings:

Event: Content is going to be viewed
 Conditions: Content is a group post or a group
Action: Set Breadcrumb

In this scenario, we have everything we need to create the breadcrumb using Token, but only on GROUP POSTS, not on the GROUP HOME PAGE.

As has been mentioned in other posts, sometimes the breadcrumb doesn't work within Panels. The workaround here is to use the "System: User is going to view a page" event instead. This works fine, we're able to set the breadcrumb here. However, there are two problems:

1) only User-related tokens are available
2) We can't seem to limit this to just the page type that we are experiencing the problems on - Panels containing a Group home page.

I'm assuming nothing can be done about #1 because the variables we need are out of scope. So I think we can work around this by creating several rules, one for each content type, each with hardcoded breadcrumbs. However, we can't seem to limit this to just a single content type using a custom PHP test. (looking at $node->type doesn't work because it's out of scope here).

So how would we go about limiting a rule to a specific content type when using the "System: User is going to view a page" event?