Current version of NGUI is 3.6.8 -- which is much, much newer than 3.0.6. I cannot support such an out of date version. It's something like 9 months out of date now. If you can't update to the latest, then your best bet would be to get a Professional license, giving yourself full access to the source code repository and its history. You will then be able to determine what changed from 3.0.6 to 3.0.7, and graft the changes into your own project, fixing whatever issue you're running into.