Nicolas,
Thank you for your prompt reply... here is my situation. I have data imported and the data has values that get changed via a product save... and thus do not work as filters... here is why:
Take for example a product with a custom field that has the double quote used for inches... my data has a value of 14" in it and that did not work, because when I saved that item using the admin from.php, that item stripped out the inch mark for that item/product. Now when I search for 14" I do not see that product... before I saved that product, I did. Also, I use that value elsewhere for display... and now all the other items have 14" displayed, but that item was saved has 14 displayed. BUT you fixed this for me by making a change to the field.php class.
I have other fields like this one... with other special characters... and need to be able to have them fixed, as you did for the inch mare, for example:
FIELD TITLE - FIELD VALUE
Fabric Weight - 10 oz/yd²
When I go to a product... and do nothing but save the product, the Fabric Weight field becomes null and is no longer displayed on the front end... and of course I now have a product that I cannot find using this value as the filter.
You recognized this as an issue for the inch symbol... why would the ® (as in Kevlar®) and the ™ and the ² (as in 10 oz/yd²) symbols be any different?
How can I import a value of 10 oz/yd² and keep it un-altered after a product save?
What am I missing?
Dennis