I was looking to fix this issue: https://issues.apache.org/jira/browse/WICKET-1421
and then i came across AbstractDecimalConverter which still caches Format objects Those are not thread safe so we should really remove those. The problem is then we also have to remove setNumberFormat(LocalemFormat) method and that is an API break. (That method could be used if you as developer know for SURE that the converter is used in 1 thread at a time) Much better would be to override getNumberFormat() and return what every you want for that locale, so that method can have bad consequents to use anyway. so again: [] remove the map and the method for 1.3 [] remove the map and the method for 1.4 johan
