Webform block redirect - strange behaviour

Hi,

I've created a webform with custom validation. The webform appears on the homepage and as a block in my sidebar. Instead of a redirect url I use a custom message. This works perfectly for the webform on the homepage, but now my block redirects to the homepage as well. Don't know why and the strange thing is, it has worked already and I have no idea why not anymore.

Any ideas, suggestions? Would appreciate it, kind of urgent :)

Thanks!