X11 plot window doesn't show graphic immediately

Hi r-help,

I have a weird problem. When I plot anything, say plot(1:10), a plot window
opens but it's empty. It looks just like this:

http://i.imgur.com/9uqO6.png

I have to resize the window, either by clicking the fullscreen icon on the
menu bar, or by dragging the borders. Then the plot is shown, but strangely
in the original size of the window, where it was before the resize:

http://i.imgur.com/tXcop.png

Then, when I resize to shrink the window back, the plot is shown too big,
how it would have fit in the previously resized window:

http://i.imgur.com/mBUo7.png

So it seems like the windows displays everything with a resize lag of 1,
i.e. according to the previous resize. Erm...

Some possibly helpful info:
- I am on Arch Linux
- R version 2.15.2
- It happens on two different computers (both Arch Linux)
- It happens when starting R from the console or from within Emacs
- plotting to a pdf("some.pdf") works fine

I have no idea where to search for the cause of that. Did anyone encounter
this or have any idea where this might come from? Pointers to where to look
for the cause are welcome too.

Thanks in advance,
 Alex