Email module becomes unresponsive after dialogue is closed

If you are in the Emails module and you click on an email in the top table the e-mail is displayed in the bottom area. However if you click say ‘Quick Create’->‘Contact’ and then click cancel to close the dialogue, now if you click on an email in the top table nothing happens in the bottom (in fact the whole interface including the right-click menu stops working).

To get it working again you have to click on the mail box name in the left hand tree which seem to refresh the top table and then things start working again.

I checked the browser console to see if there were any js errors but nothing came up.

Anyone else got/had this issue?

Thanks,

Tim
(Version 7.2.1 Sugar Version 6.5.20 (Build 1001))