diff --git a/src/data/mime_db/text/calendar b/src/data/mime_db/text/calendar
index b2e92bba45..90124b9261 100644
--- a/src/data/mime_db/text/calendar
+++ b/src/data/mime_db/text/calendar
@@ -5,11 +5,13 @@ resource(1, "META:TYPE") "text/calendar";
 
 resource(2, "META:S:DESC") #'MSDC' "iCalendar";
 
-resource(2, "META:SNIFF_RULE") #'CSTR' array {
+resource(3, "META:SNIFF_RULE") #'CSTR' array {
 	"0.50          ([0]\"BEGIN:VCALENDAR\")"
 };
 
-resource(3, "META:EXTENS") message(234) {
+resource(4, "META:EXTENS") message(234) {
+	"extensions" = "ical",
+	"extensions" = "icalendar",
 	"extensions" = "ics",
 	"extensions" = "ifb",
 	"type" = "text/calendar"
diff --git a/src/data/mime_db/text/css b/src/data/mime_db/text/css
index 6082506168..c51ec71477 100644
--- a/src/data/mime_db/text/css
+++ b/src/data/mime_db/text/css
@@ -9,4 +9,3 @@ resource(3, "META:EXTENS") message(234) {
 	"extensions" = "css",
 	"type" = "text/css"
 };
-
diff --git a/src/data/mime_db/text/markdown b/src/data/mime_db/text/markdown
new file mode 100644
index 0000000000..daa74c3dfd
--- /dev/null
+++ b/src/data/mime_db/text/markdown
@@ -0,0 +1,12 @@
+
+resource(0, "BEOS:TYPE") #'MIMS' "application/x-vnd.Be-meta-mime";
+
+resource(1, "META:TYPE") "text/markdown";
+
+resource(2, "META:S:DESC") #'MSDC' "Markdown file";
+
+resource(3, "META:EXTENS") message(234) {
+	"extensions" = "md",
+	"extensions" = "markdown",
+	"type" = "text/markdown"
+};
diff --git a/src/data/mime_db/text/x-vcard b/src/data/mime_db/text/vcard
similarity index 81%
rename from src/data/mime_db/text/x-vcard
rename to src/data/mime_db/text/vcard
index ecb52f439b..578557f1ee 100644
--- a/src/data/mime_db/text/x-vcard
+++ b/src/data/mime_db/text/vcard
@@ -1,7 +1,7 @@
 
 resource(0, "BEOS:TYPE") #'MIMS' "application/x-vnd.Be-meta-mime";
 
-resource(1, "META:TYPE") "text/x-vcard";
+resource(1, "META:TYPE") "text/vcard";
 
 resource(2, "META:S:DESC") #'MSDC' "vCard";
 
@@ -12,5 +12,5 @@ resource(2, "META:SNIFF_RULE") #'CSTR' array {
 resource(3, "META:EXTENS") message(234) {
 	"extensions" = "vcf",
 	"extensions" = "vcard",
-	"type" = "text/x-vcard"
+	"type" = "text/vcard"
 };
diff --git a/src/data/mime_db/text/x-jamfile b/src/data/mime_db/text/x-jamfile
index 3478ecaecd..253aefbda5 100644
--- a/src/data/mime_db/text/x-jamfile
+++ b/src/data/mime_db/text/x-jamfile
@@ -9,6 +9,11 @@ resource(2, "META:SNIFF_RULE") #'CSTR' array {
 
 resource(3, "META:S:DESC") #'MSDC' "Jamfile";
 
+resource(4, "META:EXTENS") message(234) {
+	"extensions" = "jam",
+	"type" = "text/x-jamfile"
+};
+
 resource(5, "META:PREF_APP") #'MSIG' "application/x-vnd.beunited.pe";
 
 resource(6, "META:ICON") #'VICN' array {
diff --git a/src/data/mime_db/text/x-makefile b/src/data/mime_db/text/x-makefile
index 58f9f4068a..ad14491863 100644
--- a/src/data/mime_db/text/x-makefile
+++ b/src/data/mime_db/text/x-makefile
@@ -9,6 +9,12 @@ resource(2, "META:SNIFF_RULE") #'CSTR' array {
 
 resource(3, "META:S:DESC") #'MSDC' "Makefile";
 
+resource(4, "META:EXTENS") message(234) {
+	"extensions" = "mk",
+	"extensions" = "mak",
+	"type" = "text/x-makefile"
+};
+
 resource(5, "META:PREF_APP") #'MSIG' "application/x-vnd.beunited.pe";
 
 resource(6, "META:ICON") #'VICN' array {
diff --git a/src/data/mime_db/text/x-source-code b/src/data/mime_db/text/x-source-code
index 46d82f18f9..7906b4d4ab 100644
--- a/src/data/mime_db/text/x-source-code
+++ b/src/data/mime_db/text/x-source-code
@@ -4,7 +4,7 @@ resource(0, "BEOS:TYPE") #'MIMS' "application/x-vnd.Be-meta-mime";
 resource(1, "META:TYPE") "text/x-source-code";
 
 resource(2, "META:SNIFF_RULE") #'CSTR' array {
-	"0.20          ([0]\"//\" | [0]\"/*\" | [0:32]\"#include\" | [0:3"
+	"0.30          ([0]\"//\" | [0]\"/*\" | [0:32]\"#include\" | [0:3"
 	"2]\"#ifndef\" | [0:32]\"#ifdef\" | [0]\"SUMMARY=\")"
 };
 
diff --git a/src/data/mime_db/text/x-vnd.be.resourcedef b/src/data/mime_db/text/x-vnd.be.resourcedef
index f75cd9391d..afcb4d0986 100644
--- a/src/data/mime_db/text/x-vnd.be.resourcedef
+++ b/src/data/mime_db/text/x-vnd.be.resourcedef
@@ -3,21 +3,18 @@ resource(0, "BEOS:TYPE") #'MIMS' "application/x-vnd.Be-meta-mime";
 
 resource(1, "META:TYPE") "x-vnd.be.resourcedef";
 
-//resource(2, "META:SNIFF_RULE") #'CSTR' array {
-//	"0.20          ([0]\"//\" | [0]\"/*\" | [0:32]\"#include\" | [0:3"
-//	"2]\"#ifndef\" | [0:32]\"#ifdef\")"
-//};
+resource(2, "META:PREF_APP") #'MSIG' "application/x-vnd.beunited.pe";
 
-resource(2, "META:S:DESC") #'MSDC' "Source for generating a resource file.";
+resource(3, "META:S:DESC") #'MSDC' "Resource definition file";
 
-resource(3, "META:EXTENS") message(234) {
+resource(4, "META:L:DESC") #'MLDC' "Source for generating a resource file";
+
+resource(5, "META:EXTENS") message(234) {
 	"extensions" = "rdef",
 	"type" = "text/x-vnd.be.resourcedef"
 };
 
-//resource(5, "META:PREF_APP") #'MSIG' "application/x-vnd.beunited.pe";
-
-resource(4, "META:ICON") #'VICN' array {
+resource(6, "META:ICON") #'VICN' array {
 	$"6E63696607050102000603399E0F3D9C0ABF82B23B84A94B88504870C900A5B1"
 	$"FFBCEAF1FFFFB3B8FF020106023E49240000000000003CAAAA4940004A3000FF"
 	$"C0D5FF7C896EFF040192020006023A4BAE3411A9B629883C6629495368484715"