http://sourceforge.net/p/xymon/code/7483/

--- xymon-4.3.17/web/acknowledge.c.orig	2015-01-30 16:49:24.984050820 -0500
+++ xymon-4.3.17/web/acknowledge.c	2015-01-30 16:49:59.834066142 -0500
@@ -289,7 +289,7 @@ int main(int argc, char *argv[])
 					pcre *dummy;
 					char *re;
 
-					re = (char *)malloc(8 + strlen(pagename));
+					re = (char *)malloc(8 + strlen(pagename)*2);
 					sprintf(re, "%s$|^%s/.+", pagename, pagename);
 					dummy = compileregex(re);
 					if (dummy) {