Index: eagle_bin/test_parser/eagle_bin.c
===================================================================
--- eagle_bin/test_parser/eagle_bin.c	(revision 9421)
+++ eagle_bin/test_parser/eagle_bin.c	(revision 9422)
@@ -1439,6 +1439,7 @@
 	unsigned char block[4];
 	int DRC_length_used = 244;
 	unsigned char DRC_block[244];
+	unsigned char c;
 	int DRC_preamble_end_found = 0;
 
 	if (fread(block, 1, 4, f) != 4) {
@@ -1462,16 +1463,23 @@
 	}
 
 	while (!DRC_preamble_end_found) {
-		if (fread(block, 1, 4, f) != 4) { /* the text preamble seems to n * 24 bytes */
+		if (fread(&c, 1, 1, f) != 1) { /* the text preamble is not necessarily n * 4 bytes */
 			printf("E: short attempted DRC preamble read. Truncated file?\n");
 			return -1;
+		} else {
+			if (c == '\0') { /* so we step through, looking for each 0x00 */
+				if (fread(block, 1, 4, f) != 4) { /* the text preamble seems to n * 24 bytes */
+					printf("E: short attempted DRC preamble read. Truncated file?\n");
+					return -1;
+				}
+				if (load_long(block, 0, 1) == 0x78
+ 					&& load_long(block, 1, 1) == 0x56
+					&& load_long(block, 2, 1) == 0x34
+					&& load_long(block, 3, 1) == 0x12) {
+						DRC_preamble_end_found = 1;
+				}
+			}
 		}
-		if (load_long(block, 0, 1) == 0x78
- 			&& load_long(block, 1, 1) == 0x56
-			&& load_long(block, 2, 1) == 0x34
-			&& load_long(block, 3, 1) == 0x12) {
-				DRC_preamble_end_found = 1;
-		}
 	}
 
 	printf("found end of DRC preamble text x78x56x34x12. About to load DRC rules.\n");