Saurik released Cydia Substrate update, bringing the package to version 0.9.6110. This fix-update, which is to released to fix known problems with corrupted extensions that cause occasional crash of Cydia.
Along with these fixes, Saurik talks about general improvements of stability, without documenting in detail the changes. It is considered a major upgrade, so the advice is to do it as soon as possible. The new substrate is proposed as an important update automatically when starting Cydia. In order to update to the Cydia Substrate, on your device go to Cydia Installer, click on Changes tab, then Modify > Upgrade to begin the process.
No news about the iOS 9.1, recall that the new Apple firmware inhibits the ability to unlock the iPhone, so the Pangu jailbreak tool only works with iOS 9.0.2 or lower versions.