It worked when i modified the string like this. Your right chris, it shouldn’t make any difference.
NSString *myDescriptionHTML = [NSString stringWithFormat:@"<html> \n"
"<head> \n"
"<style type=\"text/css\"> \n"
"body {font-family: \"%@\"; font-size: %@;}\n"
"</style> \n"
"</head> \n"
"<body>%@</body> \n"
"</html>", @"helvetica", [NSNumber numberWithInt:kFieldFontSize], content];