Internal Server Error when browsing to url of uploaded images

[Connie]

"Options -Indexes" in .htaccess works as it should:

it stops the server to show a list of all files in that directoy (which is the default behaviour when there is no index-file)

as this is a security problem, it is always safe to turn that off by using "Options -Indexes"

you can open all files from within your browser if you know the names

but why do you want to have external access? You can see all files from within the admin area

keep in mind that this is a security feature! It protects your files!