RSA subkeys

[David]

Hello,

I'm using gpg 1.2.1 on RH9. 
I consider generating RSA key as described:

master 2048 RSA key sign only, used for signing sub-keys, doesn't expire
                 |
                 |- 2048 RSA sign sub-key, for signing docs, expires
                 |
                 |- 4096 RSA encryption sub-key, expires

1. I plan to generate a new sub-key shortly before the previous one
   expires. Will my recipients consider the new sub-key as valid since
   it is signed by the master key?

2. Are there any compatibility issues I should consider?

Thanks,

David
-- 
"In theory, there is no difference between theory and practice. But, in 
practice, there is."
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