If you have a custom master page on your meeting workspaces (replaced MWSDefault.master), then you may encounter a JavaScript error for selecting a data from the left navigation if you setup a recurring meeting for that workspace.
To fix this issue open the custom master page (in SharePoint Designer if need be) and insert the following line below all of the other Register Tags and before the HTML tag starts
<%@ Register Tagprefix="Meetings" Namespace="Microsoft.SharePoint.Meetings" Assembly="Microsoft.SharePoint, Version=12.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>
next insert the following line directly below the <Body> tag.
<Meetings:PropertyBag runat="server"/>
After this publish your master page and all meeting workspaces should now work.