SOME products not adding to cart

Hi all.
I've got a strange problem that some of my products will not add to the cart from their product info page. They will add from their category page and they are all in the same sub category, but... only some from that category have this strange behavior.

The items are in the Signs/Heart Warmer Signs sub category. All except the 1st and 14th seem to be effected.

Any clue where I could start looking would be great.
Thanks, David

countrytothecore.net

I think it is caused by the .... in the product name being written in to your url.

See the Brush your teeth...Sign works, as the ... is on the end.

Best Dad...Sign same thing dots on the end and working

Should be able to set your seo urls to exclude ..... or just not use them, they really have no place in your urls anyhow.

~Melanie

i can't know what is the problem is just from your words.So,can you give me your url address of your site ,if i can see your site ,maybe i can help you!

my msn id is 'qiulinsun at hotmail.com'(at is @), you could also chat with me bye msn!

That did the trick!
Thanks very much for your help.
One of the best things about zen is the community of people sharing their knowledge.
Much appreciated,
David

BTW, I didn't necessarily want the ... in the URL.
I did however want it in the search results.
I wanted shoppers to know that it is a sign that says more than just brush your teeth. The ... simply implies their is more to it.
Best I can do is include the entire phrase first in the product description so hopefully the search results will show that.
I'd better get editing!
Thanks again,
David