That bug was fixed in versions 12.2(5.5)T 12.2(5.6) 12.2(5.6)T 12.2(5.7)S 12.2(5.6)PI 12.2(5.7)DA 12.2(6.4)PB 12.2(6.4)B
So there you can see that it was fixed in interim build 12.2(5.6)T, so this correction must be integrated in the following maintenance releases such as 12.2(8)T
so I think you can go ahead and try it, yet this bug doesn't show up in the caveats resolved for that version... http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cavs/122tcavs.htm
but, well I think it must be integrated in the version you wanna try. Also you can ask the TAC engineer who helped you.
Good luck!