QUOTE(AndyH-ha @ Apr 21 2007, 20:52)

I don't know what you mean by "zoomed in a lot" but you might have to have only around 100 milliseconds full screen in order to see the defect. Different programs display waveforms somewhat differently but generally a click is a sharp deviation from the normal flow. I usually find it easier to use Spectral View but I'm not familiar with Audacity's display.
WaveRepair is very good at repairing clicks. It has facilities to find the clicks for you.
http://www.delback.co.uk/wavrep/Since we're talking about clicks due to uncorrectable errors when ripping CDs, here's some advice about what settings to use if you want to find them with Wave Repair:
Such uncorrectable errors are usually a simple discontinuity in the waveform. That is rather different to the typical "spike" shape of clicks from vinyl records (which is what Wave Repair is primarily intended for). So when using the click detection, set the click shape to "step", and use a fairly large relative amplitude (start at a setting of about 1000; increase it if you get too many false positives, decrease if it misses the genuine clicks). But bear in mind that click detection is not guaranteed - it's very much dependent on exactly what the clicks are really like.
But if there are only a few clicks (rather than hundreds), it's probably easier to track them down manually. And as Andy said, finding them visually is much easier if you switch into spectral view - look for obvious vertical lines. But since spectral view takes much longer to paint than waveform view, it's best to first "home in" on a click when in waveform view: zoom in on smaller sections, listening as you go, until you find a section containing the click that's just a couple of seconds long. Then switch to spectral view, and the click should stand out fairly obviously. (NB. I don't think Audacity has a spectral view option - at least I can't find one).