Thanks for all of the suggestions, folks. Here is some additional information, as requested:

1) I have done a "View Source" from within Firefox to verify that there are line breaks within the source HTML, although I don't know if those are "\r\n" or just "\n". However, my cygwin environment is set up to use UNIX line endings, and it still experiences the problem.
2) Some of the sites I have tried include www.cnn.com and www.cdc.gov. In general, some of the line breaks within <script> elements seem to get preserved, but outside of those most of the HTML appears on a single line.
3) I have tried changing the agent to "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)", but I got the same results. I haven't tried using any other agent settings other than the default yet.
4) I have tried using the content returned by LWP::UserAgent with HTML::TreeParser, but it didn't seem to help, although I may need to experiment more with that.

Some additional info - I tried running my test script on another machine running Windows XP Home, and it worked fine there (i.e. whitespace was preserved), so the issue appears to be isolated to my work laptop running XP Pro. I've also tried using the Socket module to download the HTML on that machine, and I experience the same issue of whitespace being removed. Based on that, I suspect this isn't an issue specifically with LWP, but I'm not quite sure what to check next.

Thanks again for all of the help.

In reply to Re: LWP on Windows: whitespace removed from HTML by Anonymous Monk
in thread LWP on Windows: whitespace removed from HTML by Anonymous Monk

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