У вашего броузера проблема в совместимости с HTML5
Changes to the NX 11 user interface include improved capabilities for switching windows, previewing parts, and more.
Want more tips? Visit the NX Design Knowledge Base:
http://community.plm.automation.siemens.com/t5/NX-Design-Knowledge-Base/tkb-p/NXDesignKnowledgeBase
Need help? Ask the NX Design Forum, our online Community:
http://community.plm.automation.siemens.com/t5/NX-Design-Discussion-Forum/bd-p/NXDesignForum
Go here for more info on NX CAD:
http://www.plm.automation.siemens.com/en_us/products/nx/for-design/