.htaccess blocks all images from website

[bugmenot]

I installed GetSimple into a subfolder of our webspace and had to manually rename the (temp).htaccess file.

When I now try to visit my getsimple page, I get a server error message. When I instead copy the .htaccess file into the parent folder, I can visit the (now unsecured) GetSimple page, but when I visit our main website, no images are displayed.

What should I do now to get my GetSimple installation working and the images working on the rest of the website?