I am only about 7/8 days past ovulation.
I found a pregnancy test that I had left over from a couple of months ago (and ultra sensitive one) and I don;t know why but I did it (well I do know why actually, we've been told that there is practically nil chance of us conceiving, and I just thought oh what the heck I'll get rid of the last test, might as well use it!).
Anyway I didn't pay much attention to it as it was 'developing' as I knew what the result would be (given our circumstances and the fact that we only did it once around ovulation (and that was about 3 or 4 days before ovultaion!))
When I looked at it 5-10 mins later before putting in the bin it looked like there was the faintest of faintest lines in the test window. It actually looked like it was a very faint line where the line would be if it was positive (if you know what I mean!). It really was extremely faint, could hardly work it out at all.
I'm assuming this must be an 'evaporation line' or something similar? I seem to remember reading about these before.