I really like the Attachments functionality of ArcGIS 10, but I am having some trouble using them when it comes to displaying as HTML popups. I've created a Feature Class with Attachments in a File GDB and have chosen "Show content for this layer using the HTML Popup tool." Unfortunately, my .tif attachments are not being displayed. I've tried converting one of the files to .jpg and it does display. I am confused as to why .tif files are not showing up since the documentation does show a .tif file as an attachment. I would rather not have to convert all my files.
Additionally, what I really want to do is then have those files display in the Identify window in ArcGIS Explorer. Even the .jpg file is not displaying there when I add my File GDB. How can I display these files in Explorer?
One note: I use Irfanview as my default viewer. Could this be causing a conflict?