When I test drove the Android WordPress app, I had some issues uploading images:
Post ID# 11 added successfully, but an error was encountered when uploading media:
My solution was to correct the upload path in WordPress settings > media. Since this blog is hosted on a web host that graciously allows shell access, I did a `pwd` from my shell and found that it differed slightly from the preconfigured path in the WordPress media settings configuration. Updating the path fixed the issue, and I can now upload from the web UI as well as the Android app.