spreadsheet version 0.6.4.1 has been released!

The Spreadsheet Library is designed to read and write Spreadsheet Documents.
As of version 0.6.0, only Microsoft Excel compatible spreadsheets are
supported. Spreadsheet is a combination/complete rewrite of the
Spreadsheet::Excel Library by Daniel J. Berger and the ParseExcel Library by
Hannes Wyss. Spreadsheet can read, write and modify Spreadsheet Documents.

Changes:

### 0.6.4.1 / 2009-09-17

* 3 Bugfixes

* Fixes the issue reported by Thomas Preymesser and tracked down most of the
way by Hugh McGowan in
http://rubyforge.org/tracker/index.php?func=detail&aid=26647&group_id=678&atid=2677
where reading the value of the first occurrence of a shared formula
failed.

* Fixes the issue reported by Anonymous in
http://rubyforge.org/tracker/index.php?func=detail&aid=26546&group_id=678&atid=2677
where InvalidDate was raised for some Dates.

* Fixes the issue reported by John Lee in
http://rubyforge.org/tracker/index.php?func=detail&aid=27110&group_id=678&atid=2677
which is probably a duplicate of the Bug previously reported by Kadvin XJ in
http://rubyforge.org/tracker/index.php?func=detail&aid=26182&group_id=678&atid=2677
where unchanged rows were marked as changed in the Excel-Writer while the
File was being written, triggering an Error.

* 1 minor enhancement

* Detect row offsets from Cell data if Row-Ops are missing
This fixes a bug reported by Alexander Logvinov in
http://rubyforge.org/tracker/index.php?func=detail&aid=26513&group_id=678&atid=2677