Hi! i hope this answers your question (your question is almost at the bottom of the article, how ever you can also read the rest of the article) iPhoto '11: Format book text
I have deleted both text and photo one at a time and yet the warning is still
there. All the descriptions I have read about seem to indicate that the warning
should appear in the box for the object. Yet you see in the screen shot the warning is
not in the text box or photo, but instead at the bottom of the page in the border.
I will try different formats again tomorrow morning see if anything changes.
OK. You could also move everything to a new project. Copy the images/text one by one to a new file and after that, delete the old file, and then proceed to export to PDF, sometimes this get rid of stubborn nonsensical stuff like this.
Before ordering your book preview it using this method - http://support.apple.com/kb/HT1040 - and save the resulting PDF for reference - the delivered book will match it.
LN
The low resolution warning means, that the pixel size of the photos is too small for the size of the photo box on the page. As a test, move one of the photos to a smaller photo box, for example, from a page with one photo to a page with four photos. Does the triangle vanish? If yes, then scan the potos again with a larger pixel size or use smaller photo boxes, see:
iPhoto & Aperture: Warning icon when ordering photo products
Well, that fixed it. I copied the text from the text box then deleted the text in the box. Pasted the text into word doc and corrected the format. There were extra spaces and syntax that were not visible in the iPhoto text box. Once I corrected in word I pasted it back into iPhoto and the error disappeared.
Thanks for the lead. It just wasn't obvious just looking at it.
Red Triangle warning iPhoto book