with VM 2.6, Joomla 2.5.20, php 5.3 hosted by ovh shared hosting (i suppose this is unix or linux)
When displaying all product from one category, everything works fine.
When clicking on a specific product to display the detailed product description, the image does not show up at the beginning of the page if the image name contains upper case characters, but it works fine if using only lower case characters.
I checked the "component/com_virtuemart/views/productdetals/tmpl/default.php" and believe the image is displayed by "echo $this->loadTemplate('images');" around line 200.
I think VM should either reject image file with upper case or otherwise be able to show the ones with upper case as well.
Regards
Gerard
This is not a Virtuemart problem!
Just save your images with lower case letters, no spaces (underscore is ok).