Change:
Challenge has an issue. User Agent is: <codeMozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/47.0.2526.111 Safari/537.36</code. Please describe how to reproduce this issue, and include links to screenshots if possible. My code:
Hmm, I can't repro this. Do you have your browser zoomed in at all? Have you tried any other browsers?
Hey Itegman, Thanks for the response, yes my browser was size at 75%. After setting zoom to 100% the challenged passed.
Closing as a duplicate of . We've got a PR up now that will add a warning about needing to be 100% zoom for this particular challenge.

Discussion:
"Font size is controlled by the <code>font-size</code> CSS property, like this:", "<blockquote>h1 {<br>&nbsp;&nbsp;font-size: 30px;<br>}</blockquote>", "Create a second <code>p</code> element with the following kitty ipsum text: <code>Purr jump eat the grass rip the couch scratched sunbathe, shed everywhere rip the couch sleep in the sink fluffy fur catnip scratched.</code>", <del> "Inside the same <code>&#60;style&#62;</code> tag that we created for your <code>red-text</code> class, set the <code>font-size</code> of all <code>p</code> elements to 16 pixels (<code>16px</code>)." </del> <ins> "Inside the same <code>&#60;style&#62;</code> tag that we created for your <code>red-text</code> class, set the <code>font-size</code> of all <code>p</code> elements to 16 pixels (<code>16px</code>).", "<strong>Note</strong><br>Due to browser implementation differences, you may need to be at 100% zoom to pass the tests on this challenge." </ins> ], "challengeSeed": [ "<style>",

"assert($("p").length > 1, 'message: You need 2 <code>p</code> elements with Kitty Ipsum text.');", "assert(code.match(/</p>/g) && code.match(/</p>/g).length === code.match(/<p/g).length, 'message: Make sure each of your <code>p</code> elements has a closing tag.');", "assert.isTrue((/Purrs+jumps+eat/gi).test($("p").text()), 'message: Your <code>p</code> element should contain the first few words of the provided additional <code>kitty ipsum text</code>.');", <del> "assert(Number.parseInt($("p:eq(0)").css("font-size"), 10) > 15 && Number.parseInt($("p:eq(1)").css("font-size"), 10) > 15, 'message: Give elements with the <code>p</code> tag a <code>font-size</code> of <code>16px</code>.')" </del> <ins> "assert(Number.parseInt($("p:eq(0)").css("font-size"), 10) > 15 && Number.parseInt($("p:eq(1)").css("font-size"), 10) > 15, 'message: Give elements with the <code>p</code> tag a <code>font-size</code> of <code>16px</code>. Browser and Text zoom should be at 100%.');" </ins> ], "challengeType": 0, "nameEs": "Cambia el tamaño de fuente de un elemento.",

"CSS has a property called <code>width</code> that controls an element's width. Just like with fonts, we'll use <code>px</code> (pixels) to specify the image's width.", "For example, if we wanted to create a CSS class called <code>larger-image</code> that gave HTML elements a width of 500 pixels, we'd use:", "<blockquote>&#60;style&#62;<br>&nbsp;&nbsp;.larger-image {<br>&nbsp;&nbsp;&nbsp;&nbsp;width: 500px;<br>&nbsp;&nbsp;}<br>&#60;/style&#62;</blockquote>", <del> "Create a class called <code>smaller-image</code> and use it to resize the image so that it's only 100 pixels wide." </del> <ins> "Create a class called <code>smaller-image</code> and use it to resize the image so that it's only 100 pixels wide.", "<strong>Note</strong><br>Due to browser implementation differences, you may need to be at 100% zoom to pass the tests on this challenge." </ins> ], "challengeSeed": [ "<link href="http://fonts.googleapis.com/css?family=Lobster" rel="stylesheet" type="text/css">",

], "tests": [ "assert($("img").hasClass("smaller-image"), 'message: Your <code>img</code> element should have the class <code>smaller-image</code>.');", <del> "assert($("img").width() === 100, 'message: Your image should be 100 pixels wide.');" </del> <ins> "assert($("img").width() === 100, 'message: Your image should be 100 pixels wide. Browser zoom should be at 100%.');" </ins> ], "challengeType": 0, "nameEs": "Da tamaño a tus imágenes",