Odd issue with unused namespaces in style blocks

[Justin Mclean]

Hi,

Run into a very odd Flex issue today.

Some time ago in a large application we had cleaned up all of the styles and 
moved most to a central location, however a few style blocks were left about 
with local styles still containing the spark namespaces.

<fx:Style>
        @namespace s "library://ns.adobe.com/flex/spark";
        .hoverStyle {
                symbolColor: #1E78D2;
                rollOverColor: #EDF5FF;
                color: #1E78D2;
        }
</fx:Style>

Using the halo theme the application worked correctly but using the spark theme 
sometimes and seeming randomly item renderers would show up totally blank. 
Managed to finally find a sequence of steps that causes the issue to happen 
every time and it seem the fix to this issue was to remove the unused 
namespaces!

<fx:Style>
        .hoverStyle {
                symbolColor: #1E78D2;
                rollOverColor: #EDF5FF;
                color: #1E78D2;
        }
</fx:Style>

Anyone run into an issue like this or have any idea to why having an unused 
namespace would cause item renders to randomly show up blank?

I've not be able to reproduce the issue in a small sample of code but thought I 
should email the list just in case anyone run into this issue or knows why this 
might occur.

Thanks,
Justin