The Riders of Icarus closed beta test has begun for those lucky enough to have been chosen to take part in the first round of CBT. There are several known issues that players need to be made aware of and the development team has done a stellar job creating a list posted to the official site.
Currently, there are two servers available, Baellas for NA and Koroshimo for EU. Players can create up to three characters total regardless of which server they are created on. Interestingly, characters are not 'bound' to the world on which they were made and can be played interchangeably on either.
One of the most common, and actually very minor, issues is the "Launcher32.exe has stopped working". According to the list, the .exe has actually not stopped working and the message can be ignored.
Be sure to swing by the Riders of Icarus site to check out the full list.