linewidth and errorbar

Hello,

I found a problem with the function errorbar. I'm trying to change the width of the errorbar. The only way to do this seems to pass by the file .matplotlibrc and the default line width (it's not very useful I think and an option linewidth will be welcome in the errorbar function). The second problem is for the caps who are not change even with the global change (see figure in attachement).

       Nicolas

test_errorbar.png