Here is some information I was able to find out during my debug process.
The problem is related to the folowing code
Code:
<xsl:value-of select="aspdnsf:LookupImage('Product', ProductID,'','','medium', $AltText)" disable-output-escaping="yes" />
I really don't understand why this was working perfectly with 9.2 and it is not working anymore with 9.3. I will have to look at source code to understand what may have changed.
Removing that line gets everything back to work. I had to use a different alternative to get to the product image:
Code:
<img src="{concat('/images/product/medium/', ProductID, '.jpg')}" />
In my case, this works but it will fail if images are not JPG's and in case their name is not the product id#.