[G1 Android Development] Charrion:
I'm able to duplicate the error. Market keeps running however and returns to its main screen. Here's a log from the event:

09-09 23:09:10.061: INFO/ActivityManager(1409): Starting activity: Intent { action=android.intent.action.VIEW comp={com.android.vending/com.android.vending.MyDownloadsActivity} }
09-09 23:09:10.371: INFO/ActivityManager(1409): Displayed activity com.android.vending/.MyDownloadsActivity: 309 ms
09-09 23:09:10.781: DEBUG/dalvikvm(13348): GC(0) freed 7479 objects / 530464 bytes in 156ms
09-09 23:09:12.381: DEBUG/dalvikvm(13348): GC(0) freed 5770 objects / 372872 bytes in 309ms
09-09 23:09:18.001: DEBUG/dalvikvm(12230): GC(1) freed 110 objects / 7024 bytes in 376ms
09-09 23:09:20.391: DEBUG/AndroidRuntime(13348): Shutting down VM
09-09 23:09:20.391: WARN/dalvikvm(13348): threadid=3: thread exiting with uncaught exception (group=0x4001a210)
09-09 23:09:20.391: ERROR/AndroidRuntime(13348): Uncaught handler: thread main exiting due to uncaught exception
09-09 23:09:20.411: ERROR/AndroidRuntime(13348): java.lang.NullPointerException
09-09 23:09:20.411: ERROR/AndroidRuntime(13348): at com.android.vending.MyDownloadsActivity$NotificationOptionsAccessor.prepare(MyDownloadsActivity.java:761)
09-09 23:09:20.411: ERROR/AndroidRuntime(13348): at com.android.vending.BaseActivity.onPrepareDialog(BaseActivity.java:444)
09-09 23:09:20.411: ERROR/AndroidRuntime(13348): at android.app.Activity.showDialog(Activity.java:2406)
09-09 23:09:20.411: ERROR/AndroidRuntime(13348): at com.android.vending.BaseActivity.displayDialog(BaseActivity.java:387)
09-09 23:09:20.411: ERROR/AndroidRuntime(13348): at com.android.vending.MyDownloadsActivity.onMenuItemSelected(MyDownloadsActivity.java:228)
09-09 23:09:20.411: ERROR/AndroidRuntime(13348): at com.android.internal.policy.impl.PhoneWindow.onMenuItemSelected(PhoneWindow.java:820)
09-09 23:09:20.411: ERROR/AndroidRuntime(13348): at com.android.internal.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:139)
09-09 23:09:20.411: ERROR/AndroidRuntime(13348): at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:813)
09-09 23:09:20.411: ERROR/AndroidRuntime(13348): at com.android.internal.view.menu.IconMenuView.invokeItem(IconMenuView.java:519)
09-09 23:09:20.411: ERROR/AndroidRuntime(13348): at com.android.internal.view.menu.IconMenuItemView.performClick(IconMenuItemView.java:122)
09-09 23:09:20.411: ERROR/AndroidRuntime(13348): at android.view.View.onTouchEvent(View.java:3828)
09-09 23:09:20.411: ERROR/AndroidRuntime(13348): at android.widget.TextView.onTouchEvent(TextView.java:6291)
09-09 23:09:20.411: ERROR/AndroidRuntime(13348): at android.view.View.dispatchTouchEvent(View.java:3368)
09-09 23:09:20.411: ERROR/AndroidRuntime(13348): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:863)
09-09 23:09:20.411: ERROR/AndroidRuntime(13348): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:863)
09-09 23:09:20.411: ERROR/AndroidRuntime(13348): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1691)
09-09 23:09:20.411: ERROR/AndroidRuntime(13348): at android.view.ViewRoot.handleMessage(ViewRoot.java:1525)
09-09 23:09:20.411: ERROR/AndroidRuntime(13348): at android.os.Handler.dispatchMessage(Handler.java:99)
09-09 23:09:20.411: ERROR/AndroidRuntime(13348): at android.os.Looper.loop(Looper.java:123)
09-09 23:09:20.411: ERROR/AndroidRuntime(13348): at android.app.ActivityThread.main(ActivityThread.java:3960)
09-09 23:09:20.411: ERROR/AndroidRuntime(13348): at java.lang.reflect.Method.invokeNative(Native Method)
09-09 23:09:20.411: ERROR/AndroidRuntime(13348): at java.lang.reflect.Method.invoke(Method.java:521)
09-09 23:09:20.411: ERROR/AndroidRuntime(13348): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:782)
09-09 23:09:20.411: ERROR/AndroidRuntime(13348): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:540)
09-09 23:09:20.411: ERROR/AndroidRuntime(13348): at dalvik.system.NativeStart.main(Native Method)
09-09 23:09:20.431: INFO/Process(1409): Sending signal. PID: 13348 SIG: 3
09-09 23:09:20.431: INFO/dalvikvm(13348): threadid=7: reacting to signal 3
09-09 23:09:20.461: INFO/dalvikvm(13348): Wrote stack trace to '/data/anr/traces.txt'
09-09 23:09:20.671: INFO/DumpStateReceiver(1409): Added state dump to 1 crashes
09-09 23:09:24.421: INFO/Process(13348): Sending signal. PID: 13348 SIG: 9
09-09 23:09:24.451: INFO/ActivityManager(1409): Process com.android.vending (pid 13348) has died.
09-09 23:09:24.461: INFO/WindowManager(1409): WIN DEATH: Window{43d23a40 com.android.vending/com.android.vending.AssetBrowserActivity paused=false}
09-09 23:09:24.471: INFO/WindowManager(1409): WIN DEATH: Window{43af8b28 com.android.vending/com.android.vending.MyDownloadsActivity paused=false}
09-09 23:09:24.481: INFO/WindowManager(1409): WIN DEATH: Window{43a644f8 Panel:com.android.vending/com.android.vending.MyDownloadsActivity paused=false}
09-09 23:09:24.621: INFO/ActivityManager(1409): Start proc com.android.vending for activity com.android.vending/.AssetBrowserActivity: pid=13376 uid=10006 gids={3003}
09-09 23:09:24.721: INFO/jdwp(13376): received file descriptor 11 from ADB
09-09 23:09:24.981: INFO/ActivityThread(13376): Publishing provider com.android.vending.SuggestionsProvider: com.android.vending.SuggestionsProvider
09-09 23:09:25.811: DEBUG/dalvikvm(13376): GC(0) freed 4876 objects / 336960 bytes in 94ms
09-09 23:09:26.541: DEBUG/dalvikvm(13376): GC(2) freed 3668 objects / 236848 bytes in 88ms
09-09 23:09:26.641: WARN/InputManagerService(1409): Got RemoteException sending setActive(false) notification to pid 13348 uid 10006
09-09 23:09:26.731: INFO/ActivityManager(1409): Displayed activity com.android.vending/.AssetBrowserActivity: 2200 ms

Clearing cache for Market doesn't appear to help.