Ultrasharp U2410 with XPS 15 via HDMI (XPS L501X): artifacts and visual rendering issues

Monitor
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Dell UltraSharp U2410

(1) Did the monitor pass the Self Test? Yes

(2) Provide the following information in your post -
* Monitor 20 digit Serial PPID number = MX0C592M7287523S5H9L
* Monitor ports tested = HDMI
* Video card and ports tested = nVidia GeForce GT 420M, port: HDMI
* PC Model = Dell XPS L501X
* Operating System = Windows 7 Professional
* Have you updated the video card driver? Yes
* Is the monitor listed in the Device Manager under Monitors? Yes

Problem
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I recently bought aforementioned monitor and connected it to the laptop via HDMI cable (http://www.amazon.com/gp/product/B001MZXUI6/ref=oh_details_o02_s00_i00). Everything seemed to work smoothly, I plugged in the monitor and it would instantly display in the max resolution of 1920 X 1200. Opening any apps, e.g. Apple iTunes worked fine as well, the picture being very clear and crisp.

However, as soon as I opened Mozilla Firefox, I saw odd artifacts appearing. Please refer to the following screenshot as an example:

http://www.klauskomenda.com/temp/artifacts_firefox.jpg

This is the standard CNN.com page and as you can see, in addition to the green-ish dots at the top of the browser window, it also takes on this pink-ish gradient background color. Furthermore, certain items are not being rendered where they are supposed to be rendered or even duplicated (e.g. the heading "Latest News" and the headline "Brazil routes US in friendly". This behavior would continue, even if I would drag the browser window from the monitor to the built-in laptop display (when set up as "extended desktop"). I need to point out that other browsers, like Internet Explorer or Opera do not show these problems.

Another application that shows similar issues as described above is the Intel Graphics and Media Control Panel:

http://www.klauskomenda.com/temp/artifacts_Intel_Media_Center.jpg

Certain labels and text are missing as well as the background is transparent apart from the rightmost part (about one fifth) of the window.

Fixing attempts
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Based on the Dell "Drivers and Downloads" site, I upgraded my BIOS, as well as my Intel Chipset and nVidia drivers. However that did not fix the problem.

I connected the same monitor, with the same HDMI cable, to an Acer Netbook, which did not show any of those problems. So I feel that this is related to the laptop, rather than the monitor.

Also tried connecting the monitor with the Dell XPS using a different HDMI cable. Still seeing the same problem.

Would be great is anyone can offer any help here. Thanks.