Possible bug when adding new graphs

[pgb205]

Sometimes when after adding a new device I got to New graphs and try to select Traffic in/out bytes. errors in/out etc However after I select the options from the drop down menu entire list of interfaces becomes discolored and I can't select the interfaces i want. the only way out of this that I've found was to delete the device and all the data sources and start over. I tried this with both IE7 and firefox with the same results. This problem is not reproduceable.