-AIX 5.1, HP-UX 11, IRIX 6.5, OSF/1 5.1, Solaris 10, Cygwin, mingw, BeOS.
+AIX 5.1, HP-UX 11, IRIX 6.5, OSF/1 5.1, Solaris 10, Cygwin 1.5.x,
+mingw, BeOS.
+
+@item
+This function can trigger memchr bugs on some platforms:
+glibc 2.10.
+
+@item
+This function can trigger false positives for long periodic needles on
+some platforms:
+glibc 2.12, Cygwin 1.7.7.