im running apache 2.2.4, proxying to a mongrel cluster with apache handling images, javascript, and css. everything renders properly except for three little navigation buttons/images across the top. the images themselves don't show at all, all that shows is the underlying text css description. there are a number of images on the page, all of which render properly, and 5 buttons, of which three are ok,... home, about us, testimonials, refer-a-friend, and contact. the two that don't render properly are the multi-word images, about us and refer-a-friend. when i allow them to pass through and let mongrel handle it it works fine. the file names are about_us.gif and refer_a_friend.gif. the fact that they are multi-word names is the only difference i can see between the ones that work and the ones that don't. this is a strange one. im stumped. any ideas on this? if you need any additional info please let me know.