[R] Strange error in qplot

[megh]

Hi all, whenever I try to plot a histogram using qplot() function of
"ggplot2" library, I get error like this :

> qplot(rnorm(1000), geom="histogram", binwidth=0.2, main = "", xlab="",
> ylab="")
Error in scale[[1]] : subscript out of bounds

However if I remove ylab="" argument, then it is working fine. Am I missing
something?

Regards,
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