R help - May 2011 - read.csv and FileEncoding in Windows version of R 2.13.0

Dear Help List:

read.csv() seems to have changed in R version 2.13.0 as compared to version
2.12.2 when reading in simple CSV files.

In reading a 2-column CSV file ("test.csv"), say
1, a
2, b

If file is encoded as UTF-8 (on Windows 7), then under R 2.13.0
read.csv("test.csv",fileEncoding="UTF-8",header=FALSE)
yields the following output
  V1
1  ?
Warning messages:
1: In read.table(file = file, header = header, sep = sep, quote = quote,  :
  invalid input found on input connection 'test.csv'
2: In read.table(file = file, header = header, sep = sep, quote = quote,  :
  incomplete final line found by readTableHeader on 'test.csv'

Under R 2.12.2 it runs problem-free and yields the expected:
  V1 V2
1  1  a
2  2  b

Please help.

Regards,
Alex

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