diff --git a/aegisub/src/ass_dialogue.cpp b/aegisub/src/ass_dialogue.cpp
index 705c8cdaf..216b1e98d 100644
--- a/aegisub/src/ass_dialogue.cpp
+++ b/aegisub/src/ass_dialogue.cpp
@@ -108,18 +108,11 @@ AssDialogue::AssDialogue(wxString _data,int version)
 }
 
 AssDialogue::~AssDialogue () {
-	Clear();
-}
-
-void AssDialogue::Clear () {
-	ClearBlocks();
+	delete_clear(Blocks);
 }
 
 void AssDialogue::ClearBlocks() {
-	for (std::vector<AssDialogueBlock*>::iterator cur=Blocks.begin();cur!=Blocks.end();cur++) {
-		delete *cur;
-	}
-	Blocks.clear();
+	delete_clear(Blocks);
 }
 
 bool AssDialogue::Parse(wxString rawData, int version) {
diff --git a/aegisub/src/ass_dialogue.h b/aegisub/src/ass_dialogue.h
index 33243b326..4ed3abe79 100644
--- a/aegisub/src/ass_dialogue.h
+++ b/aegisub/src/ass_dialogue.h
@@ -220,9 +220,6 @@ public:
 	const wxString GetEntryData() const;
 	/// Do nothing
 	void SetEntryData(wxString) { }
-	/// Synonym for ClearBlocks
-	void Clear();
-
 
 	/// @brief Set a margin 
 	/// @param value New value of the margin
diff --git a/aegisub/src/ass_file.cpp b/aegisub/src/ass_file.cpp
index d1efac841..dc061e83a 100644
--- a/aegisub/src/ass_file.cpp
+++ b/aegisub/src/ass_file.cpp
@@ -766,20 +766,12 @@ wxString AssFile::GetWildcardList(int mode) {
 	else return _T("");
 }
 
-void AssFile::CompressForStack() {
-	for (entryIter cur=Line.begin();cur!=Line.end();cur++) {
-		AssDialogue *diag = dynamic_cast<AssDialogue*>(*cur);
-		if (diag) diag->ClearBlocks();
-	}
-}
-
 int AssFile::Commit(wxString desc, int amendId) {
 	++commitId;
 	// Allow coalescing only if it's the last change and the file has not been
 	// saved since the last change
 	if (commitId == amendId+1 && RedoStack.empty() && savedCommitId != commitId) {
 		UndoStack.back() = *this;
-		UndoStack.back().CompressForStack();
 		return commitId;
 	}
 
@@ -788,7 +780,6 @@ int AssFile::Commit(wxString desc, int amendId) {
 	// Place copy on stack
 	undoDescription = desc;
 	UndoStack.push_back(*this);
-	UndoStack.back().CompressForStack();
 
 	// Cap depth
 	int depth = OPT_GET("Limits/Undo Levels")->GetInt();
diff --git a/aegisub/src/ass_file.h b/aegisub/src/ass_file.h
index fb5113eff..8fc41b506 100644
--- a/aegisub/src/ass_file.h
+++ b/aegisub/src/ass_file.h
@@ -88,8 +88,6 @@ public:
 	/// Clear the file
 	void Clear();
 
-	/// Discard some parsed data to reduce the size of the undo stack
-	void CompressForStack();
 	/// @brief Load default file
 	/// @param defline Add a blank line to the file
 	void LoadDefault(bool defline=true);