hi,
I don't think this bug is a duplicate of 289732.  That bug says it happens when trying to import photos from a folder with a colon in the name.  Whereas I (and the OP) are experiencing the crash on startup of f-spot. 

I have mythbuntu 9.10 AMD64 with f-spot 0.6.1.5.  I am using a photos.db copied from my prior ubuntu install ... as you can see from the backtrace, the database appears to have updated correctly, but f-spot won't start.  Subsequent attempts to open F-spot go directly to the error below.  Help!  I have 7 years worth of tagged photos that I will be unable to enjoy until this bug is fixed!

mary@mythbox:~/.config/f-spot$ f-spot
[Info  21:12:24.983] Initializing DBus
[Info  21:12:25.079] Initializing Mono.Addins
[Info  21:12:25.230] Starting new FSpot server (f-spot 0.6.1.5)
[Info  21:12:25.330] Updating F-Spot Database
[Info  21:12:26.299] Database updates completed successfully (in 0.968055s).

** (f-spot:5105): CRITICAL **: atk_object_set_name: assertion `name !=
NULL' failed

** (f-spot:5105): CRITICAL **: atk_object_set_name: assertion `name !=
NULL' failed

** (f-spot:5105): CRITICAL **: atk_object_set_name: assertion `name !=
NULL' failed

** (f-spot:5105): CRITICAL **: atk_object_set_name: assertion `name !=
NULL' failed

** (f-spot:5105): CRITICAL **: atk_object_set_name: assertion `name !=
NULL' failed
[Warn  21:12:26.713] Caught an exception - URI scheme must start with
a letter and must consist of one of alphabet, digits, '+', '-' or '.'
character. (in `System')
 at System.Uri.Parse (UriKind kind, System.String uriString) [0x00000]
 at System.Uri.ParseUri (UriKind kind) [0x00000]
 at System.Uri..ctor (System.Uri baseUri, System.String relativeUri,
Boolean dontEscape) [0x00000]
 at System.Uri..ctor (System.Uri baseUri, System.String relativeUri) [0x00000]
 at FSpot.Widgets.FolderTreeModel.UpdateFolderTree () [0x00000]
 at FSpot.Widgets.FolderTreeModel..ctor () [0x00000]
 at FSpot.Widgets.FolderTreeView..ctor () [0x00000]
 at FSpot.Widgets.FolderTreePage..ctor () [0x00000]
 at (wrapper managed-to-native)
System.Reflection.MonoCMethod:InternalInvoke
(object,object[],System.Exception&)
 at System.Reflection.MonoCMethod.Invoke (System.Object obj,
BindingFlags invokeAttr, System.Reflection.Binder binder,
System.Object[] parameters, System.Globalization.CultureInfo culture)
[0x00000]
Exception has been thrown by the target of an invocation. (in `mscorlib')
 at System.Reflection.MonoCMethod.Invoke (System.Object obj,
BindingFlags invokeAttr, System.Reflection.Binder binder,
System.Object[] parameters, System.Globalization.CultureInfo culture)
[0x00000]
 at System.Reflection.MonoCMethod.Invoke (BindingFlags invokeAttr,
System.Reflection.Binder binder, System.Object[] parameters,
System.Globalization.CultureInfo culture) [0x00000]
 at System.Reflection.ConstructorInfo.Invoke (System.Object[]
parameters) [0x00000]
 at System.Activator.CreateInstance (System.Type type, Boolean
nonPublic) [0x00000]
 at Mono.Addins.RuntimeAddin.CreateInstance (System.String typeName,
Boolean throwIfNotFound) [0x00000]
 at Mono.Addins.RuntimeAddin.CreateInstance (System.String typeName) [0x00000]
 at FSpot.Widgets.SidebarPageNode.GetSidebarPage () [0x00000]
 at MainWindow.OnSidebarExtensionChanged (System.Object s,
Mono.Addins.ExtensionNodeEventArgs args) [0x00000]
 at Mono.Addins.ExtensionNode.OnChildNodeAdded
(Mono.Addins.ExtensionNode node) [0x00000]
 at Mono.Addins.ExtensionNode.NotifyChildChanged () [0x00000]
 at Mono.Addins.TreeNode.NotifyChildrenChanged () [0x00000]
 at Mono.Addins.ExtensionContext.NotifyConditionChanged
(Mono.Addins.ConditionType cond) [0x00000]
 at Mono.Addins.ExtensionContext.OnConditionChanged (System.Object s,
System.EventArgs a) [0x00000]
 at Mono.Addins.ConditionType.NotifyChanged () [0x00000]
 at FSpot.Extensions.ViewModeCondition.<ViewModeCondition>m__5 () [0x00000]
 at FSpot.Extensions.ViewModeCondition.set_Mode (ViewMode value) [0x00000]
 at FSpot.Widgets.Sidebar.HandleContextChanged (System.Object sender,
System.EventArgs args) [0x00000]