Let me give you a more in detail explanation of the issue:
The site mentioned lines below has Joomla 2.5.6 and Virtuemart 2.0.6.
Every time when I try to see that site in Google Chrome version 19.0.1084, just in the moment when the page is loading, for a very short moment, you can see, (for a few instants) the background color of the logo position. I captured that moment that you can see in the image attached number 1.
That is happening to me using two differentes machines, located in differents places, and using two differents operation systems (Windows XP and Windows 7)
Besides of that, every time when I try to see that site in Firefox version 13.0.1, just in the moment when the page is loading, for a very short moment, you can see, (for a few instants) the background color of the logo position, and the name setting in the backend, in the parameter "Global configurations" > "site Settings" > "Site Name" (in my case that parameter has next value "Sillas de Oficina | Silleti". I captured that moment that you can see in the image attached number 2.
Please, give instructions to fix the issue and avoid the behaviour showed in the two images attached.