At 03:59 AM 4/02/2010, you wrote:

>Dear Helen:
>As I see, the last stable FB version is the 2.1.3. We are in plan of
>migrating our 2.1.1.17910 SS to a Linux CentOS in a CS installation.
>We need to know what version is the most suitable to have the last bugs
>corrections to install at the new server.

The latest release version is always here:
http://www.firebirdsql.org/index.php?op=files&id=engine

>What are the snapshots? are they just for beta-testing?

Yes

> Or are they stable?

No

> Can they be installed periodically over a stable version?

For development, yes. In production, not recommended.

./heLen