[BioC] R 2.5.0-3 version inconsitance

[D.Enrique ESCOBAR ESPINOZA]

does anyone know
why R packages versions do no follow
the sources versions in the repositories?
examples:
***
siggenes     "2.4.1"
sma          "2.4.1"
spatial      "2.5.0"
splines      "2.5.0"
statmod      "2.4.1"
stats        "2.5.0"
stats4       "2.5.0"
survival     "2.5.0"
tcltk        "2.5.0"
tkWidgets    "2.4.1"
tools        "2.5.0"
utils        "2.5.0"
vsn          "2.4.1"
widgetTools  "2.4.1"
xtable       "2.4.1"
***


 
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The fish are biting.