ASPxThemeDeployer doesn't update CSS correctly

AspxThemeDeployer doesn't update/copy css corectly. All background-image directives are left blank. Eq. background-image: url(''); for Aqua theme.
Thanks, Neven.

Actual Results:

.dxpcFooter_Aqua

{

     font-size: 9pt;

     font-family: Tahoma, Verdana, Arial;

     color: #283B56;

     background-color: #CAE1FF;

     background-image: url('');

     background-position: bottom;

     background-repeat: repeat-x;

     border-width: 0px;

     border-top: Solid 1px #A3C0E8;

}

Expected Results:

.dxpcFooter_Aqua

{

     font-size: 9pt;

     font-family: Tahoma, Verdana, Arial;

     color: #283B56;

     background-color: #CAE1FF;

     background-image: url('dxpcFooterBack.gif');

     background-position: bottom;

     background-repeat: repeat-x;

     border-width: 0px;

     border-top: Solid 1px #A3C0E8;

}