I'm using Fedora Core 1 and am using it as an IMAP server. Netscape Mail can retrieve the mail without any problems. When using kmail, the inbox of the IMAP account doesn't appear. There is another POP3 connection to a different email account and I see that inbox without a problem.

How can I see the inbox for the IMAP account?

Well, most likely you'll need to create and configure that account and specify it as an IMAP rather than a POP3 type account..

Do you mean change my IMAP account to POP3 and just deal? I guess that could work, though it's not ideal. I already added the IMAP account in the "Network>Receiving" section of the KMail Configure dialog.

I can see the other folders of the IMAP fine, just not the inbox. It's a pretty important box to see. I noticed that the inbox is really in /var/spool instead of the home directory. I made a symlink to it on my home directory, but that didn't help. Any suggestions?

I've never used Kmail but it should be same as any other mail client. For the POP3 create one account and specify all POP settings. For IMAP, create another account and specify IMAP settings ..

All mails by default are delivered in /var/spool/mail by the MDA. If you want it delivered some where else then you'll have to recompile procmail (if you are using) or create a symlink for the directory. A caution here - when creating symlink, double check that no more than one hard link should exist or procmail will complain.

ln -s /home/mail /var/spool/mail

the mail directory should be owned by root.mail and the permissions of 1775 should do.