> The automatic minor ODS version upgrade upon the first
> connect was the behaviour in Alpha and Beta(?), but it
> definitely isn't in RC1.
>

From the InstallNotes.txt of FB 1.5 RC1...

--------------------------------
<snip>
1.6. Compatibility with previous versions

Name of the local IPC port is no longer compatible, i.e.
with default server settings you cannot connect to it from
applications using old client library (gds32.dll). If
necessary, you can setup the server to use old name of the
IPC map via the configuration file.

New version uses updated ODS (10.1). It doens't cause any
incompatibilities with previous versions, but you should be
aware of this fact. ODS upgrade is automatically performed
on the first connection to ODS 10.0 database. If upgrade
was unsuccessful (for any reason), the appropriate message
is written to firebird.log and ODS version kept unchanged.
Regardless of the above, backup/restore is still the
recommended procedure of migrating databases to the new
version of the server.
<snip>
--------------------------------
needs correcting then I'd say

Alan