I have observed a strange thing in the past days and I ownder if it's me only. 

When I enter someone else's image page, I don't see the prices.  For instance, for Leaf's image #11238110, this is what I see:
http://www.mariaadelaidesilva.net/dt.jpg
As you can see, no prices, no tabs for ELs, etc.

I thought it was related to my Firefox browser, as I have just tried IE and the prices and tabs appear normally.  However, when I click on Extended License, I "lose" the tabs and gets the same as in the image above; but if I click on another image, the tabs are back - that doesn't happen in FF.

FF is my default browser and this worked there before.  I can't tell about IE because I rarely use it.  I can't say however when this stopped working - a couple of weeks, maybe.

Full details of my FF:
Mozilla/5.0 (Windows; U; Windows NT 5.1; pt-BR; rv:1.9.1.4) Gecko/20091016 Firefox/3.5.4 (.NET CLR 3.5.30729)

maybe just a temporary glitch? I just checked that image of leafs and all show up correctly.

Adelade - I can't get anything to work in either FF or IE-8?

No, Leaf.

Here's a reply from DT:

Hello,
 
Thank  you  for  contacting  Dreamstime.
We are aware of this problem and we are currently investigating. We
hope to have this solved as soon as possible.
 
Best regards,
 
Carmen Pietraru
Quality Assurance and Support - Dreamstime