Jenkins 1.480.3 can't run updates

[SamL]

Hello Folks,

I am running into the following issue with Jenkins  1.480.3, on Ubuntu 12.04

SEVERE: <div class=error><img src='/static/5e2f65cb/images/none.gif' 
height=16 width=1>Digest mismatch: AjzQfzs359Dy88QEiw3mj+93a5w= vs 
gfGCUj3MGz/Lk/xwLdW7Wo7g4SI= in update center &#039;default&#039;</div>

Does anyone know what the issue might be?
Thank you very much for your help.
Sam

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