Descriptions & titles disappearing in Google

Vanishing descriptions & titles in Google.

[rydlar]

Hi,

Just wondering if anyone knows what it means to have your descriptions & titles disappear from the search results?

5 days ago when I did a site:www.mydomain.com I received 94 links with titles + descriptions as per my meta tags. Yesterday, and even more so today, I'm noticing a lot of those links turning up just as [mydomain.com...] where the Title should be, and no description.

Anyone know what it means?

Thanks in advance,
Darryl