The migration at the hosting company to the new OS is complete.
Image attachments have been restored. The forums have been updated to the current release. A few recent posts were lost as a result of the database restoration. It was unavoidable.
With the update new styles have been added. You can change the theme by going to your User Control Panel (click your name at the top) User Control Panel --> Board Preferences tab --> Edit Global Settings.
Also the hosting plan was upgraded which allowed me to set a higher image size limit for uploads and the max uploads for the entire board was upgraded as well.
LOGIN ISSUES
Now that the forums are on a new subdomain you may have trouble logging in. You will need to delete the old cookies in your browser for matsumoku.org. Once done you should be able to log in again.
As there are so many browsers now I can't list the steps for all of them but a Google search for something like "chrome delete specific cookies" should point you to the info.