I just upgraded this blog from 2.7.1 to 2.8 with no real issues. I’ve been keeping an eye on the development of 2.8 due to Fidgetr and CDN Tools, but while Fidgetr works without any issues1, CDN Tools users should do the following:
1) Enable advanced options and choose “remove JS”.
2) Upgrade to 2.8
3) Reload JS (if desired)
Additionally, deleting attachments does not work properly at this time due to an improvement in the wp_delete_attachment hook for 2.8. I’ll be releasing an update to correct both of these issues as soon as possible.