iPhone app seems to be losing Lifecast data

I'm getting weirdness on the iPhone app - it seems to have started losing my data (using a Tumblr account).

I can create a photo and sometimes when i enter the title it works ok, but sometimes the "post to blog" button doesn't appear and the title vanishes when i return to the "list" view. I have to reenter the title to post it.

But EVERY time now, after I quit Lifecast and restart it it has lost the title and often the photo as well (it is in the Photo roll but not in Lifecast).