diff --git a/Build.PL b/Build.PL
index 5733247fb..0ff81d092 100644
--- a/Build.PL
+++ b/Build.PL
@@ -12,6 +12,7 @@ my $build = Module::Build->new(
         'Getopt::Long'              => '0',
         'Math::Clipper'             => '1.01',
         'Math::Geometry::Planar'    => '0',
+        'Math::Geometry::Planar::Offset' => '0',
         'Moo'                       => '0',
         'Time::HiRes'               => '0',
         'XXX'                       => '0',
diff --git a/lib/Slic3r/GUI.pm b/lib/Slic3r/GUI.pm
index aa3f4396a..f0333ff5c 100644
--- a/lib/Slic3r/GUI.pm
+++ b/lib/Slic3r/GUI.pm
@@ -25,10 +25,14 @@ sub OnInit {
     
     my $panel = Slic3r::GUI::SkeinPanel->new($frame);
     my $box = Wx::BoxSizer->new(wxVERTICAL);
-    $box->Add($panel, 0, wxALL, 20);
+    $box->Add($panel, 0);
     
-    $frame->SetSizerAndFit($box);
+    $box->SetSizeHints($frame);
+    $frame->SetSizer($box);
     $frame->Show;
+    $frame->Layout;
+    
+    return 1;
 }
 
 sub About {
diff --git a/lib/Slic3r/GUI/SkeinPanel.pm b/lib/Slic3r/GUI/SkeinPanel.pm
index ebb6f08d0..5792ad7d0 100644
--- a/lib/Slic3r/GUI/SkeinPanel.pm
+++ b/lib/Slic3r/GUI/SkeinPanel.pm
@@ -1,6 +1,7 @@
 package Slic3r::GUI::SkeinPanel;
 use strict;
 use warnings;
+use utf8;
 
 use File::Basename qw(basename);
 use Wx qw(:sizer :progressdialog wxOK wxICON_INFORMATION wxICON_ERROR wxID_OK wxFD_OPEN);
@@ -210,12 +211,13 @@ sub new {
     my $sizer = Wx::BoxSizer->new(wxHORIZONTAL);
     foreach my $col (@cols) {
         my $vertical_sizer = Wx::BoxSizer->new(wxVERTICAL);
-        $vertical_sizer->Add($panels{$_}, 0, wxEXPAND | wxRIGHT, 10) for @$col;
+        $vertical_sizer->Add($panels{$_}, 0, wxEXPAND | wxALL, 10) for @$col;
         $sizer->Add($vertical_sizer);
     }
     
     $sizer->SetSizeHints($self);
     $self->SetSizer($sizer);
+    $self->Layout;
     
     return $self;
 }