Gel won't move solids any more.

src/elements/gel.c

@@ -50,8 +50,14 @@ int update_GEL(UPDATE_FUNC_ARGS) {
 						per *= 0.1;
 					
 					dx *= per; dy *= per;
-					parts[i].vx += dx; parts[r>>8].vx -= dx;
-					parts[i].vy += dy; parts[r>>8].vy -= dy;
+					parts[i].vx += dx; 
+					parts[i].vy += dy; 
+
+					if ((ptypes[r&0xFF].state!=ST_SOLID && ptypes[r&0xFF].state!=ST_NONE) || (r&0xFF)==PT_GOO)
+					{
+						parts[r>>8].vx -= dx;
+						parts[r>>8].vy -= dy;
+					}
 				}
 			}
 	return 0;