GSON ClassCastException in 4.0.4?

[BenV]

We are seeing a ClassCastException with the latest 4.0.4 SDK, our APK
is obfuscated (as is the admob jar) but after using retrace this is
what I get:

java.lang.RuntimeException: An error occured while executing
doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:200)
at java.util.concurrent.FutureTask
$Sync.innerSetException(FutureTask.java:273)
at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
at java.util.concurrent.FutureTask.run(FutureTask.java:137)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:
1068)
at java.util.concurrent.ThreadPoolExecutor
$Worker.run(ThreadPoolExecutor.java:561)
at java.lang.Thread.run(Thread.java:1096)
Caused by: java.lang.ClassCastException: java.lang.String
at com.google.gson.ae.a(Unknown Source)
at com.google.gson.q.a(Unknown Source)
at com.google.gson.Gson.toJson(Unknown Source)
at c.a(Unknown Source)
a
a
a
a
a
at c.doInBackground(Unknown Source)
at android.os.AsyncTask$2.call(AsyncTask.java:185)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
... 4 more
java.lang.ClassCastException: java.lang.String
at com.google.gson.ae.a(Unknown Source)
at com.google.gson.q.a(Unknown Source)
at com.google.gson.Gson.toJson(Unknown Source)
at c.a(Unknown Source)
a
a
a
a
a
at c.doInBackground(Unknown Source)
at android.os.AsyncTask$2.call(AsyncTask.java:185)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
at java.util.concurrent.FutureTask.run(FutureTask.java:137)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:
1068)
at java.util.concurrent.ThreadPoolExecutor
$Worker.run(ThreadPoolExecutor.java:561)
at java.lang.Thread.run(Thread.java:1096)

Both instances of this crash appear to have been on a DroidX. Let me
know if you need any more information.