Pop up message of xd_proxy.css, facebook issue!

Last week, a large amount of customers complained they were getting the following pop up message almost in every single website using IE:

xd_proxy[1].css

Then a notepad opens up with the following information:

.app_content_51546247891 a.uiLinkSubtle { display: none; }
.app_content_51546247891 a.UIImageBlock_ICON_Image { display: none; }

#bootloader_Zvucx { height: 42px; }

After further investigation, it was proved to be a facebook script issue. This error was also ovbsered in Firefox, Safari and Chrome, not just IE.

You can refer to https://bugs.developers.facebook.net/show_bug.cgi?id=14971

It seems to affect every single website that uses social plugins for Facebook.

Solution:

Deleting cache and cookie of the web browser. Steps for IE:

1.  From Internet Explorer menu bar, select ToolsInternet Options.
2.  From the General Tab select "Delete" found in the Browsing History section.
3.  Click  "Delete Files" , click yes to confirm.
4.  Click  "Delete Cookies", click yes to confirm.
5.  Click  "Delete Passwords", click yes to confirm.
6.  Click Close
7.  Click OK.