[MonoDevelop] Monodevevelop 1.9 Error when opening old Gtk# Project

[lordphoenix]

Hi,

I'm testing Monodevelop 1.9 on Ubuntu 10.04 and Each tim try to open an
old Gtk# Project (made with Monodevelop 1.0) I have a dialog box with 
this error : 
System.FormatException: Unknown char: .
  at System.Double.Parse (System.String s, NumberStyles style,
IFormatProvider provider) [0x00000] at System.Single.Parse
(System.String s, IFormatProvider provider) [0x00000] at
System.Convert.ToSingle (System.String value, IFormatProvider provider)
[0x00000] at System.String.System.IConvertible.ToSingle
(IFormatProvider provider) [0x00000] at System.Convert.ToType
(System.Object value, System.Type conversionType, IFormatProvider
provider) [0x00000] at System.Convert.ChangeType (System.Object value,
System.Type conversionType) [0x00000] at
Stetic.PropertyDescriptor.StringToValue (System.String value) [0x00000]
at Stetic.PropertyDescriptor.Load (System.Xml.XmlElement elem)
[0x00000] at Stetic.TypedPropertyDescriptor..ctor
(System.Xml.XmlElement elem, Stetic.ItemGroup group,
Stetic.TypedClassDescriptor klass) [0x00000] at
Stetic.TypedClassDescriptor.CreateItemDescriptor (System.Xml.XmlElement
elem, Stetic.ItemGroup group) [0x00000] at Stetic.ItemGroup..ctor
(System.Xml.XmlElement elem, Stetic.ClassDescriptor klass) [0x00000] at
Stetic.ClassDescriptor.Load (System.Xml.XmlElement elem) [0x00000] at
Stetic.TypedClassDescriptor..ctor (System.Reflection.Assembly assembly,
System.Xml.XmlElement elem) [0x00000] at
Stetic.AssemblyWidgetLibrary.LoadClassDescriptor (System.Xml.XmlElement
element) [0x00000] at Stetic.WidgetLibrary.Load (System.Xml.XmlDocument
objects) [0x00000] at Stetic.AssemblyWidgetLibrary.Load () [0x00000] at
Stetic.Registry.RegisterWidgetLibrary (Stetic.WidgetLibrary library)
[0x00000] 

It seems that it's because of stetic file. I've tried to look at it in
a text editor and find nothing special in it.

I don't think that my project has something special but I'm not sure. 
I have perhaps made a mistake in my project. I can send a zip file with
project source if necessary.

PS : Sorry for my bad English I don't speak it very often (can give
more information in french if you want)