Description of problem:
Well, I saw some strange behavior on "rpmbuild -bs"
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[tasaka1@localhost SRPMS]$ pwd
/home/tasaka1/rpmbuild/SRPMS

[tasaka1@localhost SRPMS]$ LANG=C rpmbuild -bs ../SPECS/rubygem-nokogiri.spec 
Wrote: /home/tasaka1/rpmbuild/SRPMS/rubygem-nokogiri-1.2.2-1.fc.src.rpm

[tasaka1@localhost SRPMS]$ LANG=C rpmbuild -bs ./../SPECS/rubygem-nokogiri.spec 
error: Unable to open /home/tasaka1/rpmbuild/SRPMS/SPECS/rubygem-nokogiri.spec: No such file or directory
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Well, of course ../SPECS/rubygem-nokogiri.spec and
./../SPECS/rubygem-nokogiri.spec are the same, however
with "rpmbuild -bs" the former creates a srpm but the latter
does not...

Version-Release number of selected component (if applicable):
rpm-4.7.0-0.beta1.4.fc11.i586

How reproducible:
100%

Steps to Reproduce:
1. See above
2.
3.