NullPointerException when Uploading a File

I've got file uploading working, except in one particular case. Here's my code.

Titanium.Media.openPhotoGallery({
    success:function(event) {
      uploader.upload({ files: event.media }, {
        success: function(response) {
          cb(response.id, filename);
        }
      });
    },

var upload = function(data, options) {
  parentView.add(view);
  $.progress.show();
  options = options || {}
  var xhr = Titanium.Network.createHTTPClient();
  xhr.onload = function(e) {
    var response = JSON.parse(this.responseText)[0];
 
    if (options.success) options.success(response)
    close();
  };
  xhr.onerror = function(e) {
    Ti.API.error(e);
    alert('Upload failed.  Try again.');
    if (options.error) options.error()
    close();
  };
  //xhr.setRequestHeader("enctype", "multipart/form-data");
  xhr.open('POST', Alloy.CFG.vaultUrl + 'secure/' + Ti.App.Properties.getString('vaultToken'));
  xhr.onsendstream = function(e) {
    if (options.progress) options.progress()
    $.progress.max = 1;
    $.progress.value = e.progress;
  };
  xhr.send(data);
}

Now this works most of the time, except if I choose to upload from the "Gallery" and choose an image from a Picasa album.

I've isolated this further to the blob object itself. If I call event.media.length I get this stack trace.

[ERROR] :  TiMedia: (main) [1828,30634] OnResult called: -1
[WARN] :   W/System.err: java.lang.NullPointerException
[WARN] :   W/System.err:    at java.io.File.fixSlashes(File.java:185)
[WARN] :   W/System.err:    at java.io.File.<init>(File.java:134)
[WARN] :   W/System.err:    at org.appcelerator.titanium.io.TitaniumBlob.getFile(TitaniumBlob.java:77)
[WARN] :   W/System.err:    at org.appcelerator.titanium.TiBlob.getLength(TiBlob.java:315)
[WARN] :   W/System.err:    at org.appcelerator.kroll.runtime.v8.V8Function.nativeInvoke(Native Method)
[WARN] :   W/System.err:    at org.appcelerator.kroll.runtime.v8.V8Function.callSync(V8Function.java:57)
[WARN] :   W/System.err:    at org.appcelerator.kroll.runtime.v8.V8Function.call(V8Function.java:43)
[WARN] :   W/System.err:    at org.appcelerator.kroll.runtime.v8.V8Function$1.run(V8Function.java:70)
[WARN] :   W/System.err:    at android.os.Handler.handleCallback(Handler.java:733)
[WARN] :   W/System.err:    at android.os.Handler.dispatchMessage(Handler.java:95)
[WARN] :   W/System.err:    at android.os.Looper.loop(Looper.java:136)
[WARN] :   W/System.err:    at org.appcelerator.kroll.KrollRuntime$KrollRuntimeThread.run(KrollRuntime.java:112)
[ERROR] :  TiExceptionHandler: (main) [98,30732] ----- Titanium Javascript Runtime Error -----
[ERROR] :  TiExceptionHandler: (main) [0,30732] - In alloy/controllers/gallery.js:1,69
[ERROR] :  TiExceptionHandler: (main) [1,30733] - Message: Uncaught Error: Java Exception occurred
[ERROR] :  TiExceptionHandler: (main) [0,30733] - Source: nium.Media.openPhotoGallery({success:function(t){Ti.API.info(t.media.length);v
[ERROR] :  V8Exception: Exception occurred at alloy/controllers/gallery.js:1: Uncaught Error: Java Exception occurred

Any suggestions?