diff --git a/core/acknowledgements.tid b/core/acknowledgements.tid
index 8830e8523..e7acee129 100644
--- a/core/acknowledgements.tid
+++ b/core/acknowledgements.tid
@@ -1,5 +1,4 @@
 title: $:/Acknowledgements
-type: text/vnd.tiddlywiki
 
 TiddlyWiki incorporates code from these fine OpenSource projects:
 
diff --git a/core/language/en-GB/Modals/Download.tid b/core/language/en-GB/Modals/Download.tid
index 49ea95d59..247e4ffbf 100644
--- a/core/language/en-GB/Modals/Download.tid
+++ b/core/language/en-GB/Modals/Download.tid
@@ -1,5 +1,4 @@
 title: $:/language/Modals/Download
-type: text/vnd.tiddlywiki
 subtitle: Download changes
 footer: <$button message="tm-close-tiddler">Close</$button>
 help: http://tiddlywiki.com/static/DownloadingChanges.html
diff --git a/core/language/en-GB/Modals/SaveInstructions.tid b/core/language/en-GB/Modals/SaveInstructions.tid
index 61f46dea0..79d61f0a0 100644
--- a/core/language/en-GB/Modals/SaveInstructions.tid
+++ b/core/language/en-GB/Modals/SaveInstructions.tid
@@ -1,5 +1,4 @@
 title: $:/language/Modals/SaveInstructions
-type: text/vnd.tiddlywiki
 subtitle: Save your work
 footer: <$button message="tm-close-tiddler">Close</$button>
 help: http://tiddlywiki.com/static/SavingChanges.html
diff --git a/core/templates/static.content.tid b/core/templates/static.content.tid
index 5be6cf953..f322c3d56 100644
--- a/core/templates/static.content.tid
+++ b/core/templates/static.content.tid
@@ -1,5 +1,4 @@
 title: $:/core/templates/static.content
-type: text/vnd.tiddlywiki
 
 <!-- For Google, and people without JavaScript-->
 This [[TiddlyWiki|http://tiddlywiki.com]] contains the following tiddlers:
diff --git a/core/wiki/macros/timeline.tid b/core/wiki/macros/timeline.tid
index 295d46b35..ecc0c7e7a 100644
--- a/core/wiki/macros/timeline.tid
+++ b/core/wiki/macros/timeline.tid
@@ -2,7 +2,6 @@ created: 20141212105914482
 modified: 20141212110330815
 tags: $:/tags/Macro
 title: $:/core/macros/timeline
-type: text/vnd.tiddlywiki
 
 \define timeline-title()
 <!-- Override this macro with a global macro 
diff --git a/core/wiki/title.tid b/core/wiki/title.tid
index 2d06f2eee..6db4cdca1 100644
--- a/core/wiki/title.tid
+++ b/core/wiki/title.tid
@@ -1,4 +1,3 @@
 title: $:/core/wiki/title
-type: text/vnd.tiddlywiki
 
 {{$:/SiteTitle}} --- {{$:/SiteSubtitle}}
\ No newline at end of file
diff --git a/editions/prerelease/tiddlers/system/DefaultTiddlers.tid b/editions/prerelease/tiddlers/system/DefaultTiddlers.tid
index f822081ff..c947fd59a 100644
--- a/editions/prerelease/tiddlers/system/DefaultTiddlers.tid
+++ b/editions/prerelease/tiddlers/system/DefaultTiddlers.tid
@@ -1,7 +1,6 @@
 created: 20131127215321439
 modified: 20140912135951542
 title: $:/DefaultTiddlers
-type: text/vnd.tiddlywiki
 
 [[TiddlyWiki Pre-release]]
 HelloThere
diff --git a/editions/prerelease/tiddlers/system/SiteTitle.tid b/editions/prerelease/tiddlers/system/SiteTitle.tid
index eb3d1d643..092fce693 100644
--- a/editions/prerelease/tiddlers/system/SiteTitle.tid
+++ b/editions/prerelease/tiddlers/system/SiteTitle.tid
@@ -1,6 +1,5 @@
 created: 20131211131022562
 modified: 20131211131023829
 title: $:/SiteTitle
-type: text/vnd.tiddlywiki
 
 TiddlyWiki Pre-release
\ No newline at end of file
diff --git a/editions/tw5.com/tiddlers/system/static.content.tid b/editions/tw5.com/tiddlers/system/static.content.tid
index d58eb7698..e37346d1c 100644
--- a/editions/tw5.com/tiddlers/system/static.content.tid
+++ b/editions/tw5.com/tiddlers/system/static.content.tid
@@ -1,5 +1,4 @@
 title: $:/core/templates/static.content
-type: text/vnd.tiddlywiki
 hack-to-give-us-something-to-compare-against: yes
 
 \define tv-wikilink-template() http://tiddlywiki.com/static/$uri_doubleencoded$.html