I am a little confused.  I already have

  adobe-release-x86_64-1.0-1.noarch.rpm

installed on my system because I have the adobe repository enabled.But
I only have the i386 flash-player installed, because SL 5.5 apparently
didn't support the x86_64 player yet and depended on nspluginwrapper.

Adobe released the 64-bit repo relatively recently, this dependency was not unique to SL.

Take a look in your /etc/yum.repos.d/adobe*.repo file(s). Make sure you are enabling the proper x86_64 repo to locate the 64-bit plugin (the arch will be part of the baseurl path), for example:

yum --enablerepo=adobe-linux-x86_64 search flash-plugin
yum --enablerepo=adobe-linux-x86_64 install flash-plugin.x86_64

--
Bonnie King
Scientific Linux Architecture Management
FEF Dept
630-840-8761
[email protected]

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