Drake and Colin,
First of all, I didn't see that there was a second page to this topic... oops, just read all these.
I thought .blogtitle referred to just the text, not all of the header! Hence the visibility:hidden in the child theme.
That makes sense now that I know differently.
I ended up finding another topic (by Drake) that advised someone who wasn't getting their header foreground link working to put their image in a header widget. I lost the link, sorry.
Anyway, that's what I did and I was able to position the image as I wished after that. There is only one kludge I used to get what looks like an overlap over the sidebar... to make that work properly will be another topic, as it doesn't apply to my original post.
Let me know if you can that nothing is 'broken' on the site... I didn't edit anything except the child theme CSS and Suffusion/WP settings this time, except for a child theme header to get an anchor at the top and a google font not on Suffusion's list.
Can I get you two a coffee also?