I'm working on creating a reusable and extensible web application in SharePoint 2010. I've created a master page to apply across all pages in the site. However, whenever I create a web part page and navigate to it, the site icon does not display. Instead of my custom site icon being displayed it shows the default SharePoint icon. I can get around this by placing the icon directly into the master page, but that would require me to create a new master page if I ever wanted to extend this web application.
Does anyone know why this is happening? My initial thought was that the web part page had somehow been customized to not use the default master page, but that does not seem to be the case: if I update the master page it is reflected in the web part page.
Googling around and checking this site yielded little answers. I only found one post out there that reported the same issue I am observing but there was no solution.
If it helps, I did notice one phenomena when navigating to this page. Before the page completely loads, the correct site icon appears for a split second before being replaced with the default site icon. Hope that helps.