diff --git a/resources/sql/autopatches/20140517.dxbinarycache.sql b/resources/sql/autopatches/20140517.dxbinarycache.sql
new file mode 100644
--- /dev/null
+++ b/resources/sql/autopatches/20140517.dxbinarycache.sql
@@ -0,0 +1,4 @@
+TRUNCATE {$NAMESPACE}_differential.differential_changeset_parse_cache;
+
+ALTER TABLE {$NAMESPACE}_differential.differential_changeset_parse_cache
+  CHANGE cache cache LONGTEXT COLLATE latin1_bin NOT NULL;
diff --git a/src/applications/differential/parser/DifferentialChangesetParser.php b/src/applications/differential/parser/DifferentialChangesetParser.php
--- a/src/applications/differential/parser/DifferentialChangesetParser.php
+++ b/src/applications/differential/parser/DifferentialChangesetParser.php
@@ -352,22 +352,19 @@
       return;
     }
 
-    try {
-      $changeset = new DifferentialChangeset();
-      $conn_w = $changeset->establishConnection('w');
+    $changeset = new DifferentialChangeset();
+    $conn_w = $changeset->establishConnection('w');
 
-      $unguarded = AphrontWriteGuard::beginScopedUnguardedWrites();
+    $unguarded = AphrontWriteGuard::beginScopedUnguardedWrites();
       queryfx(
         $conn_w,
-        'INSERT INTO %T (id, cache, dateCreated) VALUES (%d, %s, %d)
+        'INSERT INTO %T (id, cache, dateCreated) VALUES (%d, %B, %d)
           ON DUPLICATE KEY UPDATE cache = VALUES(cache)',
         DifferentialChangeset::TABLE_CACHE,
         $render_cache_key,
         $cache,
         time());
-    } catch (AphrontQueryException $ex) {
-      // TODO: uhoh
-    }
+    unset($unguarded);
   }
 
   private function markGenerated($new_corpus_block = '') {