Python 2.6.x version module compatibility

[Ratufa]

Suppose I have a webapp running in a virtualenv (--no-site-packages) cloned
off a Python 2.6.2  install, running under mod_wsgi.   The virtual
environment has various modules installed in it, some perhaps using C
extensions.

Question:  If the Python installation gets upgraded to 2.6.5 (or 2.6.7 at
some future point), and assuming mod_wsgi also gets compiled/installed
against the new version, will the virtual environments have to be rebuilt
and the modules re-installed?  Or, are Python installations w/in the 2.6.x
series backwards compatible enough that, in the general case, the webapp
will continue to work "as is"?  This is under Linux, if it makes a
difference.
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