If all we care about is getting it to reflect what's on the site now, then clearing the cache, etc will band-aid the problem. I'm not sure that's all that the OP is interested in. Though it might be. lol
But the real problem that would be good to address is making sure your site updates properly with various caching that can be going on between your site and your visitors. After all, you don't want to tell your visitors to clear their cache every so often because you might have updated content.
Anyway, I mention this because I think it's a bit dangerous for us webmasters to say "the problem is on the client end" when it's our responsibility to make sure that our content is served up in a way that eliminates any problems due to natural caching by the browser or by proxy caches or anything that might be in the path between our web servers and our clients' browser!
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