mudgel
There is also a new plugin Layout called "X2 Producer Effects" which only shows Cakewalk's plugins.
Right click in the FX box (one of several ways to access the Plugin Layout dialog box), select Audio FX->Plugin Layouts and select your view of choice.
Nope, that wasn't the issue, Mike. The default was checked. There were only two options displayed: the default of "everything" and the "X2 Producer Effects" option, which was not checked.
All the plug-ins show up when right clicking the effects bin and selecting the Effects submenu entry. As it turns out, I think I prefer this way of putting an effect into the effects bin over dragging from the browser in any case. This pretty much let's me keep the browser collapsed at all times.
Still, I'm very surprised if others are not experiencing this issue as well.