question on msvcrt.dll versioning

[rogerdpack]

It appears from sites like
http://www.develer.com/oss/GccWinBinaries
at the bottom that at least this developer made an effort to link
against the same version of msvcrt.dll that the python exe was
compiled with [ex: vc2008 -> msvcr90.dll].  Is this pain necessary?
Are there known drawbacks to not doing this anyone can think of? [just
trying to plan releases for windows ruby shtuffs with similar
problems].
Thanks!
-=roger