Add thousands separators to a large numeric constant.
Mark off a section of code borrowed from another subroutine.

Rephrase a line of code to be more in line with best practices.
Use new-style (Perl 5.10 and later) byte-order attrs in pack masks.

In SPWrite(), handle a failure to get the WriteContinue transaction from
the server a bit more gracefully.

Drop an unnecessary unsigned-to-signed conversion due to using order flags
in pack masks.
Use 'use base' for defining the base class instead of assigning to @ISA.

Drop unnecessary 'undef's from returns.

Return explicitly instead of implicitly, in keeping with PBP.