Unfortunately my site is not currently online as development is happening in-house with nothing being shipped out to public URLs until we are ready to go live.
Below is the markup that i'm using for the control (please note that I also tried setting the UseHttpHandlerCacheImages property programmatically at run-time to no avail):
<CE:Editor ID="Editor1" runat="server" UseHttpHandlerCacheImages="False">
<FrameStyle BackColor="White" BorderColor="#DDDDDD" BorderStyle="Solid" BorderWidth="1px"
CssClass="CuteEditorFrame" Height="100%" Width="100%" />
</CE:Editor>
This markup is present and found directly within the .aspx page itself (i also have another page where the editor has the same markup as above but is part of a user control - this page experiences the same issues).