diff -Nur jfbuild_src_20051009/include/editor.h jfbuild_src_20051009.new/include/editor.h
--- jfbuild_src_20051009/include/editor.h	2005-10-09 15:23:02.000000000 +0200
+++ jfbuild_src_20051009.new/include/editor.h	2008-03-31 21:37:31.000000000 +0300
@@ -18,7 +18,7 @@
 
 extern short temppicnum, tempcstat, templotag, temphitag, tempextra;
 extern char tempshade, temppal, tempxrepeat, tempyrepeat;
-extern char somethingintab;
+static char somethingintab;
 
 extern char buildkeys[NUMBUILDKEYS];
 
diff -Nur jfbuild_src_20051009/Makefile jfbuild_src_20051009.new/Makefile
--- jfbuild_src_20051009/Makefile	2005-10-09 15:23:00.000000000 +0200
+++ jfbuild_src_20051009.new/Makefile	2008-03-31 21:37:31.000000000 +0300
@@ -27,7 +27,7 @@
 # Debugging options
 #  RELEASE - 1 = no debugging
 #  EFENCE  - 1 = compile with Electric Fence for malloc() debugging
-RELEASE?=0
+RELEASE?=1
 EFENCE?=0
 
 # SDK locations - adjust to match your setup
diff -Nur jfbuild_src_20051009/src/build.c jfbuild_src_20051009.new/src/build.c
--- jfbuild_src_20051009/src/build.c	2005-10-09 15:23:00.000000000 +0200
+++ jfbuild_src_20051009.new/src/build.c	2008-03-31 21:37:32.000000000 +0300
@@ -86,7 +86,7 @@
 
 short temppicnum, tempcstat, templotag, temphitag, tempextra;
 char tempshade, temppal, tempvis, tempxrepeat, tempyrepeat;
-char somethingintab = 255;
+static char somethingintab = 255;
 
 static char boardfilename[BMAX_PATH], selectedboardfilename[BMAX_PATH];
 static struct _directoryitem {
diff -Nur jfbuild_src_20051009/src/crc32.c jfbuild_src_20051009.new/src/crc32.c
--- jfbuild_src_20051009/src/crc32.c	2005-10-09 15:23:00.000000000 +0200
+++ jfbuild_src_20051009.new/src/crc32.c	2008-03-31 21:37:32.000000000 +0300
@@ -73,16 +73,6 @@
 	}
 }
 
-
-unsigned long crc32(unsigned char *blk, unsigned long len)
-{
-	unsigned long crc;
-	
-	crc32init(&crc);
-	crc32block(&crc, blk, len);
-	return crc32finish(&crc);
-}
-
 void crc32init(unsigned long *crcvar)
 {
 	if (!crcvar) return;
diff -Nur jfbuild_src_20051009/src/engine.c jfbuild_src_20051009.new/src/engine.c
--- jfbuild_src_20051009/src/engine.c	2005-10-09 15:23:00.000000000 +0200
+++ jfbuild_src_20051009.new/src/engine.c	2008-03-31 21:37:32.000000000 +0300
@@ -2376,10 +2376,11 @@
 	for(z=bunchfirst[bunch];z>=0;z=p2[z])
 	{
 		wallnum = thewall[z]; nextsectnum = wall[wallnum].nextsector;
-
-		if (dastat == 0) j = sector[nextsectnum].ceilingstat;
-						else j = sector[nextsectnum].floorstat;
-
+		if (nextsectnum >= 0)
+		{
+			if (dastat == 0) j = sector[nextsectnum].ceilingstat;
+							else j = sector[nextsectnum].floorstat;
+		}
 		if ((nextsectnum < 0) || (wall[wallnum].cstat&32) || ((j&1) == 0))
 		{
 			if (x == -1) x = xb1[z];
diff -Nur jfbuild_src_20051009/src/glbuild.c jfbuild_src_20051009.new/src/glbuild.c
--- jfbuild_src_20051009/src/glbuild.c	2005-10-09 15:23:00.000000000 +0200
+++ jfbuild_src_20051009.new/src/glbuild.c	2008-03-31 21:37:32.000000000 +0300
@@ -109,7 +109,7 @@
 #ifdef _WIN32
 		driver = "OPENGL32.DLL";
 #else
-		driver = "libGL.so";
+		driver = "libGL.so.1";
 #endif
 	}
 
diff -Nur jfbuild_src_20051009/src/sdlayer.c jfbuild_src_20051009.new/src/sdlayer.c
--- jfbuild_src_20051009/src/sdlayer.c	2005-10-09 15:23:00.000000000 +0200
+++ jfbuild_src_20051009.new/src/sdlayer.c	2008-03-31 21:37:32.000000000 +0300
@@ -24,6 +24,10 @@
 // undefine to restrict windowed resolutions to conventional sizes
 #define ANY_WINDOWED_SIZE
 
+// fix for mousewheel
+#define MWHEELTICKS 10
+static unsigned long mwheelup, mwheeldown;
+
 int   _buildargc = 1;
 char **_buildargv = NULL;
 extern long app_main(long argc, char *argv[]);
@@ -486,8 +490,8 @@
 	initprintf("Initialising mouse\n");
 
 	// grab input
-	grabmouse(1);
 	moustat=1;
+	grabmouse(1);
 
 	return 0;
 }
@@ -1363,14 +1367,22 @@
 					case SDL_BUTTON_LEFT: j = 0; break;
 					case SDL_BUTTON_RIGHT: j = 1; break;
 					case SDL_BUTTON_MIDDLE: j = 2; break;
-					default: j = -1; break;
+					default: j = ev.button.button; break;
 				}
 				if (j<0) break;
 				
-				if (ev.button.state == SDL_PRESSED)
+				if (ev.button.state == SDL_PRESSED) {
+					if (ev.button.button == SDL_BUTTON_WHEELUP) {
+						mwheelup = totalclock;
+					}
+					if (ev.button.button == SDL_BUTTON_WHEELDOWN) {
+						mwheeldown = totalclock;
+					}
 					mouseb |= (1<<j);
-				else
-					mouseb &= ~(1<<j);
+				}
+				else {
+					if (j < 4) mouseb &= ~(1<<j);
+				}
 
 				if (mousepresscallback)
 					mousepresscallback(j+1, ev.button.state == SDL_PRESSED);
@@ -1435,6 +1447,17 @@
 
 	sampletimer();
 
+	if (moustat) {
+		if ((mwheelup) && (mwheelup <= (totalclock - MWHEELTICKS))) {
+			mouseb &= ~16;
+			mwheelup = 0;
+		}
+		if ((mwheeldown) && (mwheeldown <= (totalclock - MWHEELTICKS))) {
+			mouseb &= ~32;
+			mwheeldown = 0;
+		}
+	}
+
 #ifdef HAVE_GTK2
 	if (gtkenabled) update_startwin();
 #endif