In reviewing the installation/upgrade instructions for TeamCity 8.0 I came across the following:
Compatibility with YouTrack
If you use JetBrains YouTrack and use it's TeamCity integration features, please note that only YouTrack version 4.2.4 and later are compatible with TeamCity 8.0.
Here is the link: http://confluence.jetbrains.com/display/TCD8/Upgrade+Notes
I note that YouTrack 4.2.4 has not yet been published. Is this a documentation error (safe to proceed with TeamCity upgrade) or should I wait to do so until YouTrack 4.2.4 has been published?