diff --git a/src/iso.c b/src/iso.c
index 4b54deff..0086fea1 100644
--- a/src/iso.c
+++ b/src/iso.c
@@ -57,6 +57,7 @@ int64_t iso_blocking_status = -1;
 static const char* psz_extract_dir;
 static const char* bootmgr_efi_name = "bootmgr.efi";
 static const char* ldlinux_name = "ldlinux.sys";
+static const char* syslinux_v5_file = "ldlinux.c32";
 static const char* efi_dirname = "/efi/boot";
 static const char* isolinux_name[] = { "isolinux.cfg", "syslinux.cfg", "extlinux.conf"};
 static const char* pe_dirname[] = { "/i386", "/minint" };
@@ -115,6 +116,11 @@ static __inline BOOL check_iso_props(const char* psz_dirname, BOOL* is_syslinux_
 			*is_syslinux_cfg = TRUE;
 	}
 
+	// Check for a syslinux v5.0 file anywhere
+	if (safe_stricmp(psz_basename, syslinux_v5_file) == 0) {
+		iso_report.has_syslinux_v5 = TRUE;
+	}
+
 	// Check for an old incompatible c32 file anywhere
 	for (i=0; i<NB_OLD_C32; i++) {
 		is_old_c32[i] = FALSE;
diff --git a/src/rufus.c b/src/rufus.c
index 75b801da..32ad47cf 100644
--- a/src/rufus.c
+++ b/src/rufus.c
@@ -1021,11 +1021,12 @@ DWORD WINAPI ISOScanThread(LPVOID param)
 		safe_free(iso_path);
 		goto out;
 	}
-	uprintf("ISO label: '%s'\r\n  Size: %lld bytes\r\n  Has a >4GB file: %s\r\n  Uses EFI: %s%s\r\n  Uses Bootmgr: %s\r\n  Uses WinPE: %s%s\r\n  Uses isolinux: %s\n",
+	uprintf("ISO label: '%s'\r\n  Size: %lld bytes\r\n  Has a >4GB file: %s\r\n  Uses EFI: %s%s\r\n  Uses Bootmgr: %s\r\n  Uses WinPE: %s%s\r\n  Uses isolinux: %s (v%s)\n",
 		iso_report.label, iso_report.projected_size, iso_report.has_4GB_file?"Yes":"No", (iso_report.has_efi || iso_report.has_win7_efi)?"Yes":"No", 
 		(iso_report.has_win7_efi && (!iso_report.has_efi))?" (win7_x64)":"", iso_report.has_bootmgr?"Yes":"No",
-		IS_WINPE(iso_report.winpe)?"Yes":"No", (iso_report.uses_minint)?" (with /minint)":"", iso_report.has_isolinux?"Yes":"No");
-	if (iso_report.has_isolinux) {
+		IS_WINPE(iso_report.winpe)?"Yes":"No", (iso_report.uses_minint)?" (with /minint)":"", iso_report.has_isolinux?"Yes":"No",
+		iso_report.has_syslinux_v5?"5.0 or later":"4.x or earlier");
+	if (iso_report.has_isolinux && !iso_report.has_syslinux_v5) {
 		for (i=0; i<NB_OLD_C32; i++) {
 			uprintf("    With an old %s: %s\n", old_c32_name[i], iso_report.has_old_c32[i]?"Yes":"No");
 		}
@@ -1041,8 +1042,8 @@ DWORD WINAPI ISOScanThread(LPVOID param)
 		MessageBoxU(hMainDialog, "This ISO image contains a file larger than 4 GB and cannot be used to boot in EFI mode from USB.\r\n"
 			"This is a technical limitation from the UEFI/FAT32 process, not from " APPLICATION_NAME ".", "Non USB-UEFI compatible ISO", MB_OK|MB_ICONINFORMATION);
 		safe_free(iso_path);
-	} else {
-		for(i=0; i<NB_OLD_C32; i++) {
+	} else if (!iso_report.has_syslinux_v5) {	// This check is for Syslinux v4.x or earlier
+		for (i=0; i<NB_OLD_C32; i++) {
 			if (iso_report.has_old_c32[i]) {
 				fd = fopen(old_c32_name[i], "rb");
 				if (fd != NULL) {
@@ -1052,13 +1053,13 @@ DWORD WINAPI ISOScanThread(LPVOID param)
 					use_own_c32[i] = TRUE;
 				} else {
 					PrintStatus(0, FALSE, "Obsolete %s detected", old_c32_name[i]);
-					safe_sprintf(msg, sizeof(msg), "This ISO image seems to use an obsolete version of %s\n"
-						"that may prevent boot menus from displaying properly...\n\n"
+					safe_sprintf(msg, sizeof(msg), "This ISO image seems to use an obsolete version of '%s'.\n"
+						"Because of this, boot menus may not display properly.\n\n"
 						"Rufus can fix this issue by downloading a newer version for you:\n"
-						"- Select 'Yes' to connect to the internet and replace the file.\n"
-						"- Select 'No' to leave the existing ISO file unmodified.\n"
+						"- Choose 'Yes' to connect to the internet and replace the file.\n"
+						"- Choose 'No' to leave the existing ISO file unmodified.\n"
 						"If you don't know what to do, you should select 'Yes'.\n\n"
-						"Note that the file will be downloaded in the current directory and once a\n"
+						"Note: the new file will be downloaded in the current directory and once a "
 						"'%s' exists there, it will always be used as replacement.\n", old_c32_name[i], old_c32_name[i]);
 					safe_sprintf(msg_title, sizeof(msg_title), "Replace %s?", old_c32_name[i]);
 					if (MessageBoxA(hMainDialog, msg, msg_title, MB_YESNO|MB_ICONWARNING) == IDYES) {
diff --git a/src/rufus.h b/src/rufus.h
index 0c5a3ffd..2e440a14 100644
--- a/src/rufus.h
+++ b/src/rufus.h
@@ -216,6 +216,7 @@ typedef struct {
 	BOOL has_autorun;
 	BOOL has_old_c32[NB_OLD_C32];
 	BOOL has_old_vesamenu;
+	BOOL has_syslinux_v5;
 	BOOL uses_minint;
 } RUFUS_ISO_REPORT;
 
diff --git a/src/rufus.rc b/src/rufus.rc
index 6d388944..e315bd4a 100644
--- a/src/rufus.rc
+++ b/src/rufus.rc
@@ -30,7 +30,7 @@ LANGUAGE LANG_NEUTRAL, SUBLANG_NEUTRAL
 IDD_DIALOG DIALOGEX 12, 12, 206, 329
 STYLE DS_SETFONT | DS_MODALFRAME | DS_FIXEDSYS | DS_CENTER | WS_POPUP | WS_CAPTION | WS_SYSMENU
 EXSTYLE WS_EX_APPWINDOW
-CAPTION "Rufus v1.3.4.251"
+CAPTION "Rufus v1.3.4.252"
 FONT 8, "MS Shell Dlg", 400, 0, 0x1
 BEGIN
     DEFPUSHBUTTON   "Start",IDC_START,94,291,50,14
@@ -276,8 +276,8 @@ END
 //
 
 VS_VERSION_INFO VERSIONINFO
- FILEVERSION 1,3,4,251
- PRODUCTVERSION 1,3,4,251
+ FILEVERSION 1,3,4,252
+ PRODUCTVERSION 1,3,4,252
  FILEFLAGSMASK 0x3fL
 #ifdef _DEBUG
  FILEFLAGS 0x1L
@@ -294,13 +294,13 @@ BEGIN
         BEGIN
             VALUE "CompanyName", "Akeo Consulting (http://akeo.ie)"
             VALUE "FileDescription", "Rufus"
-            VALUE "FileVersion", "1.3.4.251"
+            VALUE "FileVersion", "1.3.4.252"
             VALUE "InternalName", "Rufus"
             VALUE "LegalCopyright", "© 2011-2013 Pete Batard (GPL v3)"
             VALUE "LegalTrademarks", "http://www.gnu.org/copyleft/gpl.html"
             VALUE "OriginalFilename", "rufus.exe"
             VALUE "ProductName", "Rufus"
-            VALUE "ProductVersion", "1.3.4.251"
+            VALUE "ProductVersion", "1.3.4.252"
         END
     END
     BLOCK "VarFileInfo"