This is just a minor release. I had a request in the forums about not all the properties for skmMenu working. I just had not exposed them all as properties on SiteMenu which wraps around skmMenu and populates it from the db.
The only files that have changed since version 20040403 are the dll files in the bin folder. Backup your originals and replace the files. you may need to re-start apache.
The full set of properties with defaults for the menu are as follows:
SiteMenu id="SiteMenu1" runat="server" Direction="Vertical"
MenuGridLines="Both"
BorderColor="DarkRed"
BorderWidth="1"
MenuBorderStyle="Solid"
Opacity="100"
MenuFadeDelay="1"
ItemSpacing="0"
ItemPadding="2"
DefaultCssClass=""
CssClass="MainMenu"
SelectedItemCssClass="SelectedMenuItems"
OtherItemCssClass="OtherMenuItems"
DefaultMouseDownCssClass=""
DefaultMouseOverCssClass="MainMenuMouseOver"
DefaultMouseUpCssClass=""
SubMenuCssClass=""
HighlightTopMenu="True"
ClickToOpen="False"
ZIndex="100"
These can be set in the skin file.