--- code/trunk/doc/html/pcrecallout.html	2011/08/02 11:00:40	654
+++ code/trunk/doc/html/pcrecallout.html	2011/09/11 14:31:21	691
@@ -60,6 +60,11 @@
 indicates how the pattern is matched. This is useful information when you are
 trying to optimize the performance of a particular pattern.
 </P>
+<P>
+The use of callouts in a pattern makes it ineligible for optimization by the
+just-in-time compiler. Studying such a pattern with the PCRE_STUDY_JIT_COMPILE
+option always fails.
+</P>
 <br><a name="SEC2" href="#TOC1">MISSING CALLOUTS</a><br>
 <P>
 You should be aware that, because of optimizations in the way PCRE matches
@@ -214,7 +219,7 @@
 </P>
 <br><a name="SEC6" href="#TOC1">REVISION</a><br>
 <P>
-Last updated: 31 July 2011
+Last updated: 26 August 2011
 <br>
 Copyright &copy; 1997-2011 University of Cambridge.
 <br>