I'm using OSSBuild 0.10.7 Beta 4:
  GStreamer-WinBuilds-LGPL-x86
  GStreamer-WinBuilds-SDK-LGPL-x86
Operating system: Windows 7 Ultimate 64-bit SP1.
Application: .NET4, WPF, C#, developed under VisualStudio 2010.

My application crashes after an event handler attached to playbin's AboutToFinish or VideoChanged event is executed (I haven't tried any other events).

Sample code:

//create a playbin and play a video file from the hard drive
Gst.BasePlugins.PlayBin2 playBin = new Gst.BasePlugins.PlayBin2();
string fileName = @"D:\TestVideos\test1.avi";
playBin.Uri = @"file:///" + fileName.Replace('\\', '/');
playBin.AboutToFinish += OnAboutToFinish;
playBin.SetState(Gst.State.Playing);

private void OnAboutToFinish(object o, Gst.GLib.SignalArgs args)
{
    //do nothing
}


OnAboutToFinish method will be called, but as soon as its execution finishes, the application will crash.
The crash will also happen when instead of using the C# event:
    playBin.AboutToFinish += OnAboutToFinish;
I will connect to the signal this way:
    playBin.Connect("about-to-finish", OnAboutToFinish);



The only information about the crash is a message box:
[Window Title]
VideoTestApplication
[Main Instruction]
VideoTestApplication has stopped working
[Content]
A problem caused the program to stop working correctly. Windows will close the program and notify you if a solution is available.


The Windows Event Viewer says:

Faulting application name: VideoTestApplication.exe, version: 1.0.0.0, time stamp: 0x4edcaa21
Faulting module name: libgobject-2.0-0.dll, version: 2.26.1.0, time stamp: 0x4cf826e0
Exception code: 0xc0000005
Fault offset: 0x00004fe3
Faulting process id: 0x18e8
Faulting application start time: 0x01ccb340b1cd3542
Faulting application path: C:\Users\ralph\Documents\Visual Studio 2010\Projects\VideoTestApplication\VideoTestApplication\bin\Debug\VideoTestApplication.exe
Faulting module path: C:\Program Files (x86)\OSSBuild\GStreamer\v0.10.7\bin\libgobject-2.0-0.dll

- System 
  - Provider 
   [ Name]  Application Error 
  - EventID 1000 
   [ Qualifiers]  0 
   Level 2 
   Task 100 
   Keywords 0x80000000000000 
  - TimeCreated 
   [ SystemTime]  2011-12-05T11:27:03.000000000Z 
   EventRecordID 22815 
   Channel Application 
   Computer RALPHXPS.RL.local 
   Security 
- EventData 
   VideoTestApplication.exe 
   1.0.0.0 
   4edcaa21 
   libgobject-2.0-0.dll 
   2.26.1.0 
   4cf826e0 
   c0000005 
   00004fe3 
   18e8 
   01ccb340b1cd3542 
   C:\Users\ralph\Documents\Visual Studio 2010\Projects\VideoTestApplication\VideoTestApplication\bin\Debug\VideoTestApplication.exe 
   C:\Program Files (x86)\OSSBuild\GStreamer\v0.10.7\bin\libgobject-2.0-0.dll 
   0ddc1bc3-1f34-11e1-a648-b8ac6f9f589e