Kirk
Am a bit confused. Probably the architecture is totally different, but there are plenty of applications that allow typing focus to be in a text field, with scroll wheel focus in the window that encloses the text field. Take this forum environment for one... I'm typing in here, but can merrily scroll the entire view up and down whilst retaining typing focus in here.
Isn't the IPTC window in PM just the same? Click in a text field to type, but retain the ability to scroll the entire view up and down around it?
As I said, a PM window is probably constructed completely differently to other Windows windows (erm, excuse me).
Likewise, there are other environments where there are a number of different panels within a single window, and as you move over each panel the scroll wheel focus moves (take gmail for a start). Probably the panels in the main PM window are different to that? Maybe separate windows in effect? Can you not grab scrolling focus once you detect the mouse is (say) within the thumbnail panel / window? Clearly you can detect when the mouse moves over the thumbnails, because the four icons overlaid on the thumbnails moves, but you can't use that knowledge to force thumbnail focus into that same thumbnail panel / window?
Mike