I just noticed this stack trace by chance while debugging another app.
This question on SO might help to solve it.
11-01 16:51:58.401: E/ActivityThread(23590): Service com.android.exchange.ExchangeService has leaked ServiceConnection com.android.emailcommon.service.ServiceProxy$ProxyConnection@42a64ee0 that was originally bound here
11-01 16:51:58.401: E/ActivityThread(23590): android.app.ServiceConnectionLeaked: Service com.android.exchange.ExchangeService has leaked ServiceConnection com.android.emailcommon.service.ServiceProxy$ProxyConnection@42a64ee0 that was originally bound here
11-01 16:51:58.401: E/ActivityThread(23590): at android.app.LoadedApk$ServiceDispatcher.<init>(LoadedApk.java:982)
11-01 16:51:58.401: E/ActivityThread(23590): at android.app.LoadedApk.getServiceDispatcher(LoadedApk.java:876)
11-01 16:51:58.401: E/ActivityThread(23590): at android.app.ContextImpl.bindService(ContextImpl.java:1719)
11-01 16:51:58.401: E/ActivityThread(23590): at android.app.ContextImpl.bindService(ContextImpl.java:1708)
11-01 16:51:58.401: E/ActivityThread(23590): at android.content.ContextWrapper.bindService(ContextWrapper.java:480)
11-01 16:51:58.401: E/ActivityThread(23590): at com.android.emailcommon.service.ServiceProxy.setTask(ServiceProxy.java:158)
11-01 16:51:58.401: E/ActivityThread(23590): at com.android.emailcommon.service.ServiceProxy.setTask(ServiceProxy.java:146)
11-01 16:51:58.401: E/ActivityThread(23590): at com.android.emailcommon.service.AccountServiceProxy.restoreAccountsIfNeeded(AccountServiceProxy.java:135)
11-01 16:51:58.401: E/ActivityThread(23590): at com.android.exchange.ExchangeService$11.run(ExchangeService.java:4454)
11-01 16:51:58.401: E/ActivityThread(23590): at com.android.emailcommon.utility.Utility$2.doInBackground(Utility.java:980)
11-01 16:51:58.401: E/ActivityThread(23590): at com.android.emailcommon.utility.Utility$2.doInBackground(Utility.java:977)
11-01 16:51:58.401: E/ActivityThread(23590): at android.os.AsyncTask$2.call(AsyncTask.java:287)
11-01 16:51:58.401: E/ActivityThread(23590): at java.util.concurrent.FutureTask.run(FutureTask.java:234)
11-01 16:51:58.401: E/ActivityThread(23590): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
11-01 16:51:58.401: E/ActivityThread(23590): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
11-01 16:51:58.401: E/ActivityThread(23590): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
11-01 16:51:58.401: E/ActivityThread(23590): at java.lang.Thread.run(Thread.java:856)