The new version number for the preview build is 14926. This is the first such preview build released to Fast Ring Insider members since August 31. In a blog post, Windows Insider leader Dona Sarkar stated:
Thanks for being patient with us as we upgraded some of our engineering tools last week. Our build monitoring system is purring again and today we are excited to be releasing Windows 10 Insider Preview Build 14926 for PC and Mobile to Windows Insiders in the Fast ring.