When you use images to enrich your application, you may notice that the images are not displayed.
This problem occurs because of wired known behavior of IIS that affects cached generated resources. It seems as the Microsoft KB says that generated files that are defined to be cached are cached wrongly by the IIS which in some cases tries to search the physical file instead of using the HTTPHandler.
REFERENCES
For more information, click the following article number to view the article in the Gizmox Knowledge Base: