All software updates and releases comes with bugs. Companies fix them in the next upgrades. This happens to all products including Apple mobile operating system for iPhone 5S / 4S / 5 / 5c / 4 and other fruit devices. iOS 7.1.1 downloadlinks are available to users who want to install the latest release. If you still have doubts whether you should update or not you can take a look at the bug fixes introduced in the new version.
iOS 7.1.1 update solves one big problem with HTTP. There was the bug called “triple handshake” or CVE-1295 that could affect iDevices. The issue is known as very serious because it could easily allow hackers or bad guys to circumvent your SSL security encryption by exploiting the HTTP bug.
This security flaw can harm you unless you upgrade to iOS 7.1.1, according to Apple notes. If you are afraid that someone can get your personal data or mess up with the operators done in SSL sessions, you are advised to update. If you want to stay jailbroken and not afraid of such security bugs you are good to leave your previous jailbroken firmware.
The firmware also fixes some other issues experience by iPad, iPhone and iPod users in previous OS releases. Experts believe that iOS 7 is pretty stable compared to other operating systems for iDevices. It is still problematic but Apple is working on patching holes and security bugs.