when using ie9 compatibility mode or ie7 with version
the select buttons of the initially hidden file upload dialog are displayed under the
file explorer. it works properly with ie9 standatd and ie8.
i can reproduce the issue also with your online demo
some similar effects happen with other controls too:
when using nested splitters and radwindows sometimes buttons are not displayed in compatibility mode
sometimes they are only displayed when using compatibility mode, but its hard to reproduce the behaviour because
it changed with every last release.