We're all happy to see Android 4.3 finally make its appearance, especially as it brings some pretty important and positive low-level improvements like Bluetooth Low Energy and TRIM support. Unfortunately, new versions often introduce new bugs that slip by even the most diligent testers. Jelly Bean 4.2 had its fair share of issues, including an almost comically bad oversight: the total annihilation of December in the stock Contacts app. This is why each major release is often followed by a couple of bug fix OTAs in the following weeks.
In a minor update to the official Gmail app, Google has addressed one of "the little things" that have been plaguing Android since the beginning. In this case, a lack of uniformity for copying text.
In all previous versions of the Gmail app, a user would have to press Menu, More, and then Select Text. Fortunately, this update fixes that issue by making copying text the same as in the Browser or a textbox: by long pressing it.