Components removed :
TsGridAdapter (TsSkinProvider component have all functionality of TsGridAdapter now and more even)
Components added :
TsMagnifier
---------------------------------------------------------------
Components changed :
All RefreshScrolls procedures are removed
All VSBar, and HSBar properties are removed

TsScrollBox
  property FullRepaint removed
  added OnMouseEnter and OnMouseLeave events
TsFrameAdapter
  DoHook procedure removed
TsSkinProvider
  Added skinning support of most standard edit controls
  BorderIcons property removed (Form.BorderIcons property used now)
TsCheckBox, TsRadioButton
  MultiLine property removed
TsButton, TsBitBtn, TsCheckBox, TsRadioButton
  WordWrap property supported
---------------------------------------------------------------
Files removed :
sDBSwitch.pas
sGridAdapter.pas
sUtils.pas renamed to acUtils.pas (old copy of sUtils.pas may be found in the Ac4Deprecated.zip)

TsDriveComboBox, TsPathComboBox and TsFileListBox controls has been moved to separated package 
http://www.alphaskins.com/sfiles/ac4deprecated.zip
(these controls are deprecated in the AC5).
_______________________________
Other news :
Improved algorithm of form showing and skins changing, animation effects added
// Most controls kind may be customized on the fly (OnGetDisplayData event has been added)
Completely changed work with scrollbars in all controls
Most standard edit controls are supported automatically if TsSkinProvider placed on form
Automatic support of most known grids, inherited from TCustomGrid