Office Web Apps broken in IE11 after CU installation

We just installed the Oct 2013 CU and during testing found that Word and PowerPoint Office Web Apps now do not work in IE11 only. IE 8-10, Firefox, Chrome, and Safari all still display documents fine using Office Web Apps.  Excel Web App doesn't display
an error, but it also seems to have issues and doesn't always display the ribbon menu with IE11 only. 
The error being displayed is "Sorry, we ran into a problem"
Does anyone have any ideas on what is causing or has seen a similar issue?
Nick Hurst

There are posts about problems with SP & IE 11 all over the place. It's a known issue. Most of the problems can be solved by changing the compatability mode in IE. Here's some links you can check out:
cameron rautmann

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    Follow or contact me at...
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    Follow or contact me at...
    This post is my own opinion and does not necessarily reflect the opinion or view of Microsoft, its employees, or other MVPs.

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    Follow or contact me at...
    This post is my own opinion and does not necessarily reflect the opinion or view of Microsoft, its employees, or other MVPs.

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    TechNet Community Support

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    Robson Hasselhoff - Follow me @Robk9e

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    Name="Office Web Apps Monitoring" />
    SystemTime="2014-02-04T20:49:39.000000000Z" />
      <Channel>Microsoft Office Web Apps</Channel>
    - <EventData>
      <Data><?xml version="1.0" encoding="utf-16"?> <HealthReport xmlns:xsd=""
    xmlns:xsi=""> <HealthMessage>AgentManagerWatchdog reported status for
    AgentManagerWatchdog in category 'Recent Watchdog Reports'. Reported status: Machine health is Unhealthy</HealthMessage> </HealthReport></Data>
    - <Event xmlns="">
    - <System>
    Name="Office Web Apps Monitoring" />
    SystemTime="2014-02-04T20:49:39.000000000Z" />
      <Channel>Microsoft Office Web Apps</Channel>
    - <EventData>
      <Data><?xml version="1.0" encoding="utf-16"?> <HealthReport xmlns:xsd=""
    xmlns:xsi=""> <HealthMessage>AgentManagerWatchdog reported status for
    AgentManagerWatchdog in category 'Recent Watchdog Reports'. Reported status: Machine health is Unhealthy</HealthMessage> </HealthReport></Data>
    Further exploration of ULS log files (C:\ProgramData\Microsoft\OfficeWebApps\Data\Logs\ULS) did not yield particularly much, except the following;
    02/04/2014 20:48:04.48  UlsControllerWatchdog.exe (0x1244)       0x0F60 Services Infrastructure        Uls Controller Watchdog        ajbam Assert 
     We're about to trace a string for category MsoSpUlsControllerWatchdog at level Info and we expect to find in the log later, but it appears that the category has been throttled. We will never be able to find the string and this watchdog will always fail.
    StackTrace:   at Microsoft.Office.Web.UlsControllerWatchdog.Program.CheckServiceInstance(ServiceInstance serviceInstance)     at Microsoft.Office.Web.Common.WatchdogHelperThreadManager.GetHealthResults(WatchdogExecutionContext
    context, ServiceInstance si)     at Microsoft.Office.Web.Common.WatchdogHelperThreadManager.WatchingThreadMethod(Object o)     at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback
    callback, Object state, Boolean preserveSyncCtx)     at System.Threading.ExecutionContext.Ru... 345fbec5-e958-4f1f-bf56-d65c1c0d472a
    02/04/2014 20:48:04.48* UlsControllerWatchdog.exe (0x1244)       0x0F60 Services Infrastructure        Uls Controller Watchdog        ajbam Assert 
     ...n(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)     at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()    
    at System.Threading.ThreadPoolWorkQueue.Dispatch()   345fbec5-e958-4f1f-bf56-d65c1c0d472a
    02/04/2014 20:48:05.52  UlsControllerWatchdog.exe (0x1244)       0x0F60 Services Infrastructure        Services Infrastructure Health adhog Unexpected Health report
    by UlsControllerWatchdog: Agent: UlsController, eventId: 1204, eventType: Error, categoryId: 1, eventMessage: <?xml version="1.0" encoding="utf-16"?>  <HealthReport xmlns:xsd=""
    xmlns:xsi="">    <HealthMessage>UlsControllerWatchdog reported status for UlsController in category 'Verify Trace Logging'. Reported
    status: Could not find trace string in ULS logs in C:\ProgramData\Microsoft\OfficeWebApps\Data\Logs\ULS.</HealthMessage>    <ComponentOwner>ServicesInfrastructure</ComponentOwner>  </HealthReport> 345fbec5-e958-4f1f-bf56-d65c1c0d472a
    02/04/2014 20:48:05.52  UlsControllerWatchdog.exe (0x1244)       0x0F60 Services Infrastructure        Services Infrastructure Health adhoh Unexpected Health report
    by UlsControllerWatchdog (persistent): Agent: UlsController, eventId: 2204, eventType: Error, categoryId: 1 345fbec5-e958-4f1f-bf56-d65c1c0d472a
    I suspect these might be related, but can't seem to find any logical explanation why this should cause the Get-OfficeWebAppsMachine to report HealthStatus of Unhealthy.  If related, is there a way to disable this check or remove throttling in a safe
    way?  Alternatively if this is some coding issue (I've not found any other blog/QA dealing with this particularly) it would be nice to get confirmation of this and potentially a fix/solution.
    Any help would be greatly appreciated. Thank you!

    Hi ChristiaanB,
    You get this ULS error because you change the log verbosity of the OWA farm. I wrote an article for this on my blog : OWA unhealthy uls issue

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