<<You should ask about this in firebird-devel. There has been some
Solaris-talk there recently about 64-bit I/O, and I don't think the Solaris
build guys watch this list.>>

Work is taking place currently on a 64bit I/O build (Classic and SuperServer) FB
1.03.
We have bumped into a few issues re. Classic and proper 64bit I/O support for
backup and
restore. Those issues are being worked on. If I could ask for a little bit of
patience, once the
problems have been worked out, and the build tested, it will get posted onto
Sourceforge.
Until then, it'd not working properly at the moment.

Regards
Paul