I want to buy Microsoft Front Page to create web pages. However, some
of the complaints about this program is that posting to the web
requires that the web site have Front Page extensions. What are
"extensions" and is there an easy way to correct for this problem?
Thanks.

FrontPage extentions are something (as far as I know) optional.
Sites don't recuire thease extentions, but they support them.
So there's no point in buying Frontpage just for this. Better get
openoffice.org and you'll get thesame for free.
Just save your pages as html and you'll be fine.

You can turn off the use of Front page extensions.

FrontPage Extensions are CGI programs (basically scripts) which
provide the server side implementation needed for all versions of
Microsoft FrontPage. FrontPage extensions are required in order to
properly upload and use many of the tools and WebBots that FrontPage
offers.

If you are designing your web site using Microsoft FrontPage, you will
need to have FrontPage extensions installed in order for you to be
able to use the full functionality of the features. But not all hosts
offer FrontPage extensions, so if you plan on using FrontPage, it is
important to check that your chosen host offers the extensions. Some
web hosts will offer it for free when you sign up, while others
require a nominal monthly or yearly fee to install and update them.

I hope it helps.
Phossil.

Online-Solutions.org does offer the front page ext at no cost. I am
currently going through them for a test site.

I would use dreamweaver MX 2004 it supports more document formats then
frontpage. it also puts less senseless things that shows that it was
generated by frontpage. but 90% of web hosts provide frontpage
extensions at no extra cost.

You can use FrontPage to design the web pages themselves, but without
the Server Extensions you will be limited to only being able to use
basic HTML pages.  The extensions on the server add the ability to put
counters, forms, and other eye candy products that use special coding
from the Microsoft programs.  If the web host you plan on using does
not support front page extensions it would be a waste of money to
purchase the product.  Other programs such as open office as mentioned
earlier will give you the same design elements for your web page but
the products are free.  The dreamweaver product mentioned is a little
more complex than Frontpage, I wouldn't recommend it if you are a
first time web page designer.