I actually opened a thread on the Opera site (
Media Type for XML+XSLT Sites - Opera Mini - Opera Community) hoping to find out that there is simply a different media type I would need to specify to get the page to display in Opera Mini. Unfortunately, it seems that Opera is the only browser that supports the media tag, causing the page to break in Internet Explorer or Firefox, due to the two browsers diametrically opposed implementations of XSLT. For IE, whichever template I specify first is used, and Firefox uses the last specified template.