> I have just taken knee trembling step of ordering D6. WIll I be able
> to continue using IBO3.6 or will I have to move to 4?

I highly recommend moving to IBO 4. You will not absolutely have to now,
however.

> Any other gotcha's I may encounter?

Please review the release notes. It's all in there for the most part.

HTH,
Jason Wharton
CPS - Mesa AZ
http://www.ibobjects.com