Be sure to follow these directions precisely!
1. Archive your photos into a ZIP file
IMPORTANT: The ZIP archive must contain NO FOLDERS or extra files (.DS_Store or __MACOSX folders). Examples:
2. Head over to the upload page and browse to your file.
3. Click the Upload button to start the upload process.
4. If everything goes ok, click Continue.
5. Give Tumblr permisson to post to your queue by clicking "Allow".
6. If all goes well, you should just have uploaded a batch of photos to your queue!