A new Windows 10 Mobile Preview build, which was planned for release today has now been delayed until sometime next week, due to the discovery of another bug that would have prevented users from updating the build with future versions.

Windows Insider head Gabriel Aul posted the news of the delay on his Twitter feed;

"I have some bad news folks. We discovered an issue late last night that would have caused builds after 10536 to not install over it. It is caused by our UpdateGen process which enables the build-to-build deltas. The good news is we were already flighting the next build which has the Store fix, so we have that one close behind. But the bad news is that it will be early next week, so no build today."

"We're going to be working over the weekend here and get it out as soon as we can while ensuring quality."

It's likely that the build that will be out next week will have another version number, rather than 10536.

Source: Gabriel Aul (Twitter)