I thought i had perfectly mirrored my own site at smugmug.com,

but today I found that all the underscores are gone so the original url wont
work:

<http://....Beijing-Botanic-Garden/i-GmLpVZV/1/L/DSC_7629-L.jpg>

has become

<http://....Beijing-Botanic-Garden/i-GmLpVZV/1/L/DSC7629-L.jpg>

so the underscore after DSC_ is gone...and become DSC.

is there an option to change this behavior?