Axis labels not changed in gplots.plotmeans

Question

When creating a plot using gplots.plotmeans, the axis labels are not set to what I want, but to "means" and "Index". Here is the code:

library(gplots)
plotmeans(ioe.dimension ~ ioe$profile, 
              col=3,
              xlab="Profile",  ylab="Means",
              ylim=c(2.5,6.5),
              bars=FALSE)
abline(h=4, lty=2, col=2)

The resulting plot is this:

Answer 1

This happens for some reason when bars = FALSE. I don't know why, but for me it works to first remove the labels with ann = F and then add them with a call to title().

library(gplots)
plotmeans(ioe.dimension ~ ioe$profile, 
          col=3,
          ylim=c(2.5,6.5),
          bars=FALSE,
          ann=F)
title(xlab="Profile",  ylab="Means")
abline(h=4, lty=2, col=2)