monodevelop can not start and this is the message: MonoDevelop failed to start. The following error has been reported: Extension node not found in path: /MonoDevelop/ProjectModel/FileFormats. System.InvalidOperationException: Extension node not found in path: /MonoDevelop/ProjectModel/FileFormats at Mono.Addins.ExtensionContext.AddExtensionNodeHandler (System.String path, Mono.Addins.ExtensionNodeEventHandler handler) [0x00000] at Mono.Addins.AddinManager.AddExtensionNodeHandler (System.String path, Mono.Addins.ExtensionNodeEventHandler handler) [0x00000] at MonoDevelop.Projects.ProjectService..ctor () [0x00000] at MonoDevelop.Projects.Services.get_ProjectService () [0x00000] at MonoDevelop.Ide.Gui.ProjectOperations..ctor () [0x00000] at MonoDevelop.Ide.Gui.IdeApp.Initialize (IProgressMonitor monitor) [0x00000] at MonoDevelop.Ide.Gui.IdeStartup.Run (System.String[] args) [0x00000] mono version: mono-basic-2.2-1.fc10.x86_64 mono-winforms-2.2-1.fc10.x86_64 mono-data-sqlite-2.2-1.fc10.x86_64 monodevelop-1.9-6.fc10.x86_64 mono-addins-0.3.1-2.2.fc10.x86_64 mono-web-2.2-1.fc10.x86_64 mono-core-2.2-1.fc10.x86_64 mono-nunit22-2.2.10-7.fc10.x86_64 mono-extras-2.2-1.fc10.x86_64 monodoc-2.2-1.fc10.x86_64 mono-debugger-2.2-2.fc10.x86_64 mono-data-2.2-1.fc10.x86_64
Can you try the current version in updates-testing please?
unfortunately I upgraded to F11, even when I was using F10, I used rawhide mono packages there and it worked well.
I've tested starting monodevelop in F10 and F11 (x86) and I couldn't not reproduce the problem. Since the reporter already updated to F11, I'll close this bug report against monodevelop in F10.