This tweet pretty much sums up the whole post:
If you’re not familiar with the background, however, the Cliff’s Notes version comes down to Thesis Theme using a license other than GPL, which created a conflict between Thesis Theme creator Chis Pearson and Matt Mullenweg, of Automattic (the parent of WordPress.com).
Suffice it to say, we’re happy to see that Pearson will be working under GPL. It is worthy to note, however, that Thesis is now licensed under a GPL split. We could go into the various legalities surrounding split GPL licensing, but I believe that Twitter user @jschuller explained it best: