probable grave bug: SPSS data with umlauts in factor levels can lead to data loss

[meik michalke]

hi,

i've run into a weird problem that turned out to be a really dangerous bug: 
we've imported a SPSS .sav file that had some variables with predefined factor 
levels, which were transformed into R factors. entering data was possible 
without problems, no warnings were raised.

we saved the data to a .Rdata file (no warnings or errors), but when we re-
imported it later on, all cells with a factor level that had an umlaut in its 
name (e.g., "männlich") were just <NA>, both in the editor window as well as 
in the R console. that is, the data was completely gone and had to be re-
entered. this was reproduceable.

i renamed a level from "männlich" into "maennlich" and only then the data was 
correctly saved.


viele grüße :: m.eik

-- 
  dipl. psych. meik michalke
  institut f"ur experimentelle psychologie
  abt. f"ur diagnostik und differentielle psychologie
  heinrich-heine-universit"at d-40204 d"usseldorf
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