The policy used to be:
SE-development is usually only in trunk, so no Liferay-provided SE-releases (or CE, Community-Edition) are to be expected from branches, once the "next" version is out.
Working with CE you usually update to the latest version or pick the bugs that you ran into (or that are critical enough to require a fix) and apply it to your system. You can usually pick the patches from any later version, as long as the code in question has not been radically changed.
Now that the 5.3 release has been delayed, it currently seems that 5.2.3 was the last CE release prior to 5.3 (schedule unknown to me). However, having talked to some of the Liferay people in Frankfurt/Offenbach, I have good faith that something will be done to address this unfortunate state until 5.3 comes out. (Have you noticed that the current EE is no longer called 5.2.4? It's now "EE SP1". IMHO this sends a nice signal. I might be wrong, but I don't want to ;)
We'll see where this leads to - I'm curious.
P.S.: The current situation is ok with me, but, of course, I could always make use of more ;)
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