My "Optimized for Professional Output" mention was in response to niagaramouse's previous post.
Yes, I have clicked on the Settings button on the Publish to PDF dialog box and have gone through each and every one of the PDF settings available. As I mentioned in my previous post, the settings that I have been using with no problems at all for the last 7 months started looking wonky just with the most recent issue. When I first started working with this printer, we went through the settings together so that we could both be sure that I had them the way that they would receive them best. I saved those settings specifically for that printer for this very reason.
The image files come in as both RGB and CMYK depending on the source. There are a lot of different magazine photographers, and often my editors will find images online that they like.
When this problem began last month, I found that I could sort of fix it by converting the entire page to CMYK bitmap before publishing to PDF. The problem most often occurs when text is overtop of a bitmap. The text would appear to be very thin when it occured over an image, and appear normal anywhere else. Any RGB bitmaps would also export very faded in color.
The most curious thing about all of this is that I have not changed anything with the imported images (some were RGB, yes!) or the settings that I use for Publishing to PDF and I had no problems until just last month. The images would all Publish to CMYK PDF as their full vibrant colors and there were no discrepancies with my text.
I am quite confused and hope that this additional information may enlighten someone. If there are any settings as to which you are curious, please be specific and I'll surely be glad to answer any questions you might have.
Thank you!