VisualGST in *buntu 12.04

Hi, just got back to Smalltalk world again :)

After upgrading my Kubuntu to 12.04, I install gst and gst-browser from the repository. gst runs OK, but gtk-browser ends up in the following trace:

Object: CFunctionDescriptor new: 1 "<0x40460550>" error: Invalid C call-out g_initially_unowned_get_type
SystemExceptions.CInterfaceError(Smalltalk.Exception)>>signal (ExcHandling.st:254)
SystemExceptions.CInterfaceError class(Smalltalk.Exception class)>>signal: (ExcHandling.st:161)
Smalltalk.CFunctionDescriptor(Smalltalk.CCallable)>>callInto: (CCallable.st:165)
GInitiallyUnowned class>>getType (GTK.star#VFS.ZipFile/Funcs.st:1)
optimized [] in GLib class>>registerAllTypes (GTK.star#VFS.ZipFile/GtkDecl.st:78)
Smalltalk.OrderedCollection>>do: (OrderColl.st:68)
GLib class>>registerAllTypes (GTK.star#VFS.ZipFile/GtkDecl.st:78)
Smalltalk.UndefinedObject>>executeStatements (GTK.star#VFS.ZipFile/GtkImpl.st:1078)
Object: CFunctionDescriptor new: 1 "<0x404a12d8>" error: Invalid C call-out gtk_window_new
SystemExceptions.CInterfaceError(Exception)>>signal (ExcHandling.st:254)
SystemExceptions.CInterfaceError class(Exception class)>>signal: (ExcHandling.st:161)
CFunctionDescriptor(CCallable)>>callInto: (CCallable.st:165)
GTK.GtkWindow class>>new: (GTK.star#VFS.ZipFile/Funcs.st:1)
VisualGST.GtkDebugger(VisualGST.GtkMainWindow)>>initialize (VisualGST.star#VFS.ZipFile/GtkMainWindow.st:131)
VisualGST.GtkDebugger class(VisualGST.GtkMainWindow class)>>openSized: (VisualGST.star#VFS.ZipFile/GtkMainWindow.st:19)
[] in VisualGST.GtkDebugger class>>open: (VisualGST.star#VFS.ZipFile/Debugger/GtkDebugger.st:16)
[] in BlockClosure>>forkDebugger (DebugTools.star#VFS.ZipFile/DebugTools.st:380)
[] in Process>>onBlock:at:suspend: (Process.st:392)
BlockClosure>>on:do: (BlkClosure.st:193)
[] in Process>>onBlock:at:suspend: (Process.st:393)
BlockClosure>>ensure: (BlkClosure.st:269)
[] in Process>>onBlock:at:suspend: (Process.st:370)
[] in BlockClosure>>asContext: (BlkClosure.st:179)
BlockContext class>>fromClosure:parent: (BlkContext.st:68)

my GTK version is 2.24.10-0ubuntu6. Got any solution?