New and improved photo uploading/linking. To link to an image on the web, click on the image icon in the text editor:
Then, in the pop-up, enter the URL of the image:
To upload one or more images from your computer, click on attachments, then browse to the image(s) and click "upload." Once you see the thumbnails you can add titles if you want and re-order by clicking and dragging by the tiny dot to the left of the thumbnail.