Not a bug per se, but Airbus claimed some of the delays in the production of A380 were due to incompatible designs from two different versions of the CAD software used.<p><a href="http:&#x2F;&#x2F;calleam.com&#x2F;WTPF&#x2F;?p=4700" rel="nofollow">http:&#x2F;&#x2F;calleam.com&#x2F;WTPF&#x2F;?p=4700</a>