I've just released a new version of Excel extension for PHP, v0.9.8. The main purpose of this release is to add compatibility for libxl 3.4. From the library ChangeLog there appear to be quite a few fixes to the library, so it looks like a worth while upgrade for most users.
You can download the tarball at
http://ilia.ws/patch/php-excel-0.9.8.tar.bz2.
Sources are available at
https://github.com/iliaal/php_excel/.
One important note, the 3.4.0 version of LibXL has a bug that causes numbers to be improperly written to files, therefor you should ONLY use version 3.4.1 that is available at
http://www.libxl.com/download/libxl-3.4.1.tar.gz