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I've installed a theme on my wp site, and added the code to display the categories, and i get after each category a "NaN" text, no idea what is it, and how can i stop this to show up.

I've check the code in index.php, and there's nothing to make those "NaN" texts appear.

Here's the site, http://yamses.com/mido/ in the left you'll see the categories.

Thank you in advance.

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NaN stands for "Not a Number". I think it is supposed to display the number of posts under these categories. But it's hard to help without any code. – xsonic Sep 19 '12 at 15:02
let me know wich files you'll need to take a look, i will upload them on tny.cz. Thanks – Daniel Sep 19 '12 at 15:14
If it's a free theme tell me the themename and I'll have a look. It could be many files. Try index.php – xsonic Sep 20 '12 at 6:38
Or try #post-tags .cat-item > li > a > span {display: none;} in your css to hide it. – xsonic Sep 20 '12 at 6:41
NaN comes from Javascript (off topic). For a more detailed explanation, try this example in your console. Also: If this is closed source and the author doesn't offer a public repository somewhere, then it's off-topic. – kaiser Sep 29 '12 at 13:25

closed as too localized by Brian Fegter, kaiser, Wyck, toscho♦ Sep 29 '12 at 21:46

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