Calculating with the Add mode


We are having problems maintaining color consistency for digital output (as well as color shifts on proofs) due to the recent CS6 Pantone Plus color library update.
We have had to remove the updated libraries and replace them with the previous versions due to the unexpected color differences on output.
Has anyone else been having problems with the Plus update?
Is there a good explanation of why it was changed in the first place? We want to make sure we're not missing a good reason for the revised color libraries.
Chuck
Pantone Plus (Solid) color libraries are now based on Lab value compared to previous one using CMYK as default in Illustrator And InDesign.
Lab values help to keep consistency between Photoshop, Illustrator and InDesign when you want to convert to CMYK.
Each application are doing a color transform like this: Source (Lab) -> Destination (CMYK or RGB) using the related working color space defined in the color setings preferences.
This make sure that when you convert to CMYK for example, the best match will be made for the current CMYK working space you are using.
If you set all your color setings the same within each application, you will get the same CMYK values.

Can you tel me more about the problem you have with the new Pantone Plus libraries?

I jumped to get AI CS6 as soon as it came out- and now, honestly, I'm regretting it.
We do large digital output, and PMS spot colors are critical. I'm finding that anything I copy into a new doc, converts to lab- and I have to manually plug in the CMYK mixes for the spot colors. It's taking a ton of time that I wouldnt otherwise have;
If you find the magic bullet, please share it with the class.