> Ok, thanks, how about the oposite?

How about reading release notes? You will find that there's nothing about
FB 2.0.

> Accessing FB 2.0 with this
> Implementation-Version: 1.5.5JDK_1.4 (build: CVSTag=HEAD
> date=200412051247)
>
> Is that alright or it doesnt work too?

Most code will work, but some DatabaseMetaData methods will return false
results or throw exceptions. Also you will get some exceptions in
ParameterMetaData. No support for UTF8 charset (UNICODE_FSS is supported).

Roman