--- ZynAddSubFX-2.4.0-orig/src/Misc/XMLwrapper.cpp	2010-02-10 18:36:01.000000000 -0500
+++ ZynAddSubFX-2.4.0/src/Misc/XMLwrapper.cpp	2010-02-10 19:51:09.000000000 -0500
@@ -307,14 +307,16 @@ char *XMLwrapper::doloadfile(const strin
     int filesize=-1;
 
     //try get filesize as gzip data (first)
+    char buf[1024*512];
     gzFile gzfile=gzopen(filename.c_str(),"rb");
     if (gzfile!=NULL) {//this is a gzip file
         // first check it's size
         while (!gzeof(gzfile)) {
-            gzseek (gzfile,1024*1024,SEEK_CUR);
-            if (gztell(gzfile)>10000000) {
+            //--- Replaced gzseek by gzread to circumvent a problem introduced
+            //--- in the devel version of zlib (1.2.3.7)
+            if (gzread(gzfile, buf, 1024*512) == 0) {
                 gzclose(gzfile);
-                goto notgzip;//the file is too big
+                goto notgzip; // failed to read from the file
             };
         };
         filesize=gztell(gzfile);