[BioC] missing probe_id in ath1121501.db

[Stefan Bleuler]

Hi,

I am working with the Bioconductor annotation package for the 
Arabidopsis thaliana GeneChip ATH1 and have found a strange difference 
between version 2.7 and versions 2.8 or 2.9.

In 2.7:
source("http://bioconductor.org/biocLite.R")
biocLite("ath1121501.db")
library("ath1121501.db")
length(as.list(toggleProbes(ath1121501ACCNUM,"all")))

produces the following output:
[1] 22810

In 2.8 or 2.9 the same code produces the following output:
[1] 22809

Comparing the lists of probe_ids shows that the probe_id 245651_s_at is 
present in 2.7 and not present in 2.8 or 2.9. I know that the 
annotations for a given probe_id can change with updates but why would a 
probe_id be removed? This probe_id is still present in the latest 
annotation files provided by Affymetrix.

Thanks for any idea.

Stefan Bleuler