Shortly after launching Alpha1 I was working on the podcast plugin and noticed some code got erased from the /site/helpers/writexml.php file which caused it to error out. I replaced that code with the function from 6.2 in the plugin and it works fine so I replaced it in the alpha1 component package but didn't up the version.
If you were among the first 25 who downloaded alpha1 you may want to reinstall. You don't have to do migration, simply install the component over the top.
Alternatively, you can unzip the new component file and just replace the writexml.php file.
Tom