Happy 2012 right back at you, David!
Thank you for your reply. I went to that link and read through it (though I must admit I skimmed quite a few of the 43 postings) and I don’t think it really helps with the problem. Most of the images in the formerly PageMaker files I have been converting to InDesign files are Illustrator files so that the endless debate over 72ppi vs 300dpi (yadda yadda yadda) is not going to help. When I went through some of them looking for .tifs. .jpgs and other pixelated images, I found very few that were much bigger than a couple of centimetres across, mostly smaller. I did open some of them in Photoshop and changed their resolutions to something similar to their actual on-page resolution, then did a Save As but the change to file size was negligible.
I have known about the Save As feature from way back in the PageMaker days (I began using it about 1994 or 1995) but again, I don’t think it applies in this case as, to save a PM file as an InD file, one HAS to Save As anyway.
The embedded colour profiles thing might be worth exploring, though I am feeling out of my depth a little. There were only three references to “profile” in that thread of 43 messages and none of them seemed to offer any help. Perhaps you (or someone else who can’t leave the forum alone when it is a holiday) can point me to a suitable thread to help me begin to understand.
For the record, I am using CS5.5 on an iMac (late 2007) running Mac OS X 10.7.2 (Lion). Virtually all of my work gets printed on an inkjet desktop printer (Canon iX7000) so, although it uses CMYK inks, like all inkjets, it prefers me to send it RGB files. Only on rare occasions does a job get sent to a commercial printer in CMYK.