Three cheers for Alfresco for changing their license to the GPL.
The first cheer is because they are shifting away from a license which, as a modified version of an OSI-approved license, was not, technically, Open Source as the OSI defines it.
We all remember the days when high-flying technology companies reported "pro-forma" financials instead of pure GAAP financials. The logic was that GAAP was the standard upon which their model was based, but they just wanted to make a few tweaks to better reflect the true value of their company. The liberties some companies took with GAAP created a slippery slope for both the companies and their investors, leading to massive discrepancies between reports and reality. Starting with an OSI-approved open source license and then making some discretionary changes without getting the new license approved can (and has) led to similar problems with respect to the spirit and the letter of the OSD. By stepping away from a modified Mozilla license and embracing an OSI-approved license, Alfresco makes their intentions clear to all--they are an Open Source business.