[BioC] Expression values from gcRMA are different than before

[Glyn Bradley]

Hi all
I'm running gcRMA via affylmGUI on data from the ATH1 chip

The expression levels I get now are very slightly different to those I 
got at the end of last year.
I'm assuming something has been updated, but does anyone know what 
exactly? Is it the implementation of gcRMA, or is it more likely to be 
changes in where we think the probes map to?

Thanks

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