Is the system waiting for google-analytics

We had a similar problem on a MP3 file playing in Safari, but not under Chrome (10).

Interesting enough, the solution was, believe it or not, in the time stamp of the file, which was in future (due to our recording script) for files being not playable for Chrome. So as soon as we modified the time stamp on the MP3 to the current/past time the MP3 file played well in Chrome as well.

Tools at hand, curl:

$ curl -I http://x.y.z.42/mp3files/2011/4/9/foo-h13.mp3
HTTP/1.1 200 OK
Date: Sat, 09 Apr 2011 15:39:48 GMT
Server: Apache/2.2.9 (Debian) PHP/5.2.6-1+lenny9 with Suhosin-Patch
Last-Modified: Sat, 09 Apr 2011 15:39:48 GMT
ETag: W/"c7a00c9-1b77609-4a082a5de8441"
Accept-Ranges: bytes
Content-Length: 28800521
Content-Type: audio/mpeg

... and to check the validity of the MP3 file (mp3check, part of Debian package directory):

$ mp3check -a foo-h13.mp3
foo-h13.mp3:
anomaly: audio mpeg version 2.0 stream
anomaly: sampling rate 22.1kHz
anomaly: bitrate  64kbit/s
anomaly: mode single chann
anomaly: no crc

So, it turned out that the "certain sites" were sites that used a secure connection (https) or that had content coming from a secure site (such as google analytics if you use https as prefix in your code). In "Internet Options" i went to "Content" and clicked on "Clear SSL state". This did the job

More detailed instructions can be found here http://support.microsoft.com/kb/967897 where it says "I can't access my bank or other secure websites"

When you connect to a secure website, Internet Explorer uses an encrypted channel that uses Secure Sockets Layer (SSL) technology to encrypt transactions. Corrupted information in the SSL can cause websites not to load correctly. Clearing the SLL state may resolve this problem. To do this, follow these steps for your version of Windows. Windows 8

Swipe in from the right edge of the screen (if you're using a mouse, press Windows logo key+C keys), and then tap or click Search.

Enter Internet options in the search box, and then tap or click Settings. In the search results, tap or click Internet Options. Tap or click the Content tab, and then tap or click ClearSSL state.

Windows Vista and Windows 7

Click the Start button, type Internet Explorer in the search box, and then, in the list of results, click Internet Explorer.
In Internet Explorer, click Tools, and then click Internet Options.
Click the Content tab, and then click Clear SSL state.

If clearing the SSL state does not resolve the problem, the date and time settings on your PC might be incorrect. Some secure sites require that the date and time on your PC match the date and time of the website. To check the date and time, follow these steps for your version of Windows. Windows 8

Swipe in from the right edge of the screen (if you're using a mouse, press the Windows + C keys), and then tap or click Search.

Enter date and time in the search box, and then tap or click Settings. In the search results, tap or click Date and Time, and then tap or click Change date and time. In the Date and Time Setting window, set the current date and time. Click OK, click Apply, and then click OK.

Windows Vista and Windows 7

In Control Panel, open Date and Time. To do this, click the Start button, type date and time in the Start Search box, and then click

Date and Time in the Programs list. Click Change date and time. In the Date and Time Settings dialog box, set the date and time to the correct values. Click OK two times.

If you still can’t access secure websites, get help from the Microsoft Community online.