Windows 2000 is no longer supported, for it is no longer supported by Microsoft.
The limitations on “temporary” and “permanent” variables
for compiled clauses have been dropped. There is no size limit on
compiled clauses.
PO files and saved-states are now much smaller than in earlier releases.
The new features required changes to the PO file format. PO files and
saved-states created by previous versions are not compatible with this
version, and vice versa.
The spld tool now defaults to --moveable on Linux,
Mac OS X and Solaris. This can be turned off with the new option
--no-moveable.