diff --git a/package.json b/package.json
index b842c4ae1..23c476dac 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "name": "trilium",
   "productName": "Trilium Notes",
   "description": "Trilium Notes",
-  "version": "0.32.3",
+  "version": "0.32.4",
   "license": "AGPL-3.0-only",
   "main": "electron.js",
   "bin": {
diff --git a/src/public/javascripts/dialogs/branch_prefix.js b/src/public/javascripts/dialogs/branch_prefix.js
index ef8f77b57..152a3c526 100644
--- a/src/public/javascripts/dialogs/branch_prefix.js
+++ b/src/public/javascripts/dialogs/branch_prefix.js
@@ -21,7 +21,7 @@ async function showDialog() {
     branchId = currentNode.data.branchId;
     const branch = await treeCache.getBranch(branchId);
 
-    $treePrefixInput.val(branch.prefix).focus();
+    $treePrefixInput.val(branch.prefix);
 
     const noteTitle = await treeUtils.getNoteTitle(currentNode.data.noteId);
 
@@ -46,6 +46,8 @@ $form.submit(() => {
     return false;
 });
 
+$dialog.on('shown.bs.modal', () => $treePrefixInput.focus());
+
 export default {
     showDialog
 };
\ No newline at end of file
diff --git a/src/services/build.js b/src/services/build.js
index fc97035b2..00ab27bba 100644
--- a/src/services/build.js
+++ b/src/services/build.js
@@ -1 +1 @@
-module.exports = { buildDate:"2019-06-02T14:04:32+02:00", buildRevision: "fbfb7b3b306d48ba9e7c09b7218af7354c58a3d1" };
+module.exports = { buildDate:"2019-06-05T22:53:34+02:00", buildRevision: "97a258c0c61177f7a3578f41691d2bd9a600f5b8" };
diff --git a/src/services/import/single.js b/src/services/import/single.js
index 578187efe..1fb682421 100644
--- a/src/services/import/single.js
+++ b/src/services/import/single.js
@@ -47,8 +47,46 @@ const CODE_MIME_TYPES = {
     'text/x-yaml': true
 };
 
+// extensions missing in mime-db
+const EXTENSION_TO_MIME = {
+    ".cs": "text/x-csharp",
+    ".clj": "text/x-clojure",
+    ".erl": "text/x-erlang",
+    ".hrl": "text/x-erlang",
+    ".feature": "text/x-feature",
+    ".go": "text/x-go",
+    ".groovy": "text/x-groovy",
+    ".hs": "text/x-haskell",
+    ".lhs": "text/x-haskell",
+    ".http": "message/http",
+    ".kt": "text/x-kotlin",
+    ".m": "text/x-objectivec",
+    ".py": "text/x-python",
+    ".rb": "text/x-ruby",
+    ".scala": "text/x-scala",
+    ".swift": "text/x-swift"
+};
+
+function getMime(fileName) {
+    if (fileName.toLowerCase() === 'dockerfile') {
+        return "text/x-dockerfile";
+    }
+
+    const ext = path.extname(fileName).toLowerCase();
+
+    console.log("EXT", ext);
+
+    if (ext in EXTENSION_TO_MIME) {
+        console.log(EXTENSION_TO_MIME[ext]);
+
+        return EXTENSION_TO_MIME[ext];
+    }
+
+    return mimeTypes.lookup(fileName);
+}
+
 async function importSingleFile(importContext, file, parentNote) {
-    const mime = mimeTypes.lookup(file.originalname);
+    const mime = getMime(file.originalname);
 
     if (importContext.textImportedAsText) {
         if (mime === 'text/html') {
@@ -87,7 +125,7 @@ async function importFile(importContext, file, parentNote) {
         target: 'into',
         isProtected: parentNote.isProtected && protectedSessionService.isProtectedSessionAvailable(),
         type: 'file',
-        mime: mimeTypes.lookup(originalName),
+        mime: getMime(originalName),
         attributes: [
             { type: "label", name: "originalFileName", value: originalName },
             { type: "label", name: "fileSize", value: size }
@@ -102,7 +140,7 @@ async function importFile(importContext, file, parentNote) {
 async function importCodeNote(importContext, file, parentNote) {
     const title = getFileNameWithoutExtension(file.originalname);
     const content = file.buffer.toString("UTF-8");
-    const detectedMime = mimeTypes.lookup(file.originalname);
+    const detectedMime = getMime(file.originalname);
     const mime = CODE_MIME_TYPES[detectedMime] === true ? detectedMime : CODE_MIME_TYPES[detectedMime];
 
     const {note} = await noteService.createNote(parentNote.noteId, title, content, {
diff --git a/src/services/setup.js b/src/services/setup.js
index d06ec46e7..b56284316 100644
--- a/src/services/setup.js
+++ b/src/services/setup.js
@@ -5,6 +5,7 @@ const repository = require('./repository');
 const optionService = require('./options');
 const syncOptions = require('./sync_options');
 const request = require('./request');
+const appInfo = require('./app_info');
 
 async function hasSyncServerSchemaAndSeed() {
     const response = await requestToSyncServer('GET', '/api/setup/status');
@@ -27,7 +28,8 @@ async function sendSeedToSyncServer() {
     log.info("Initiating sync to server");
 
     await requestToSyncServer('POST', '/api/setup/sync-seed', {
-        options: await getSyncSeedOptions()
+        options: await getSyncSeedOptions(),
+        syncVersion: appInfo.syncVersion
     });
 
     // this is completely new sync, need to reset counters. If this would not be new sync,
diff --git a/src/services/sync_table.js b/src/services/sync_table.js
index d7b41e850..110db688f 100644
--- a/src/services/sync_table.js
+++ b/src/services/sync_table.js
@@ -62,26 +62,33 @@ async function cleanupSyncRowsForMissingEntities(entityName, entityKey) {
 }
 
 async function fillSyncRows(entityName, entityKey, condition = '') {
-    await cleanupSyncRowsForMissingEntities(entityName, entityKey);
+    try {
+        await cleanupSyncRowsForMissingEntities(entityName, entityKey);
 
-    const entityIds = await sql.getColumn(`SELECT ${entityKey} FROM ${entityName}`
-        + (condition ? ` WHERE ${condition}` : ''));
+        const entityIds = await sql.getColumn(`SELECT ${entityKey} FROM ${entityName}`
+            + (condition ? ` WHERE ${condition}` : ''));
 
-    for (const entityId of entityIds) {
-        const existingRows = await sql.getValue("SELECT COUNT(id) FROM sync WHERE entityName = ? AND entityId = ?", [entityName, entityId]);
+        for (const entityId of entityIds) {
+            const existingRows = await sql.getValue("SELECT COUNT(id) FROM sync WHERE entityName = ? AND entityId = ?", [entityName, entityId]);
 
-        // we don't want to replace existing entities (which would effectively cause full resync)
-        if (existingRows === 0) {
-            log.info(`Creating missing sync record for ${entityName} ${entityId}`);
+            // we don't want to replace existing entities (which would effectively cause full resync)
+            if (existingRows === 0) {
+                log.info(`Creating missing sync record for ${entityName} ${entityId}`);
 
-            await sql.insert("sync", {
-                entityName: entityName,
-                entityId: entityId,
-                sourceId: "SYNC_FILL",
-                utcSyncDate: dateUtils.utcNowDateTime()
-            });
+                await sql.insert("sync", {
+                    entityName: entityName,
+                    entityId: entityId,
+                    sourceId: "SYNC_FILL",
+                    utcSyncDate: dateUtils.utcNowDateTime()
+                });
+            }
         }
     }
+    catch (e) {
+        // this is to fix migration from 0.30 to 0.32, can be removed later
+        // see https://github.com/zadam/trilium/issues/557
+        log.error(`Filling sync rows failed for ${entityName} ${entityKey} with error "${e.message}", continuing`);
+    }
 }
 
 async function fillAllSyncRows() {