like I already stated on another plugins page:

I am still wondering why a lot of plugins break because of this small change I have. And installing into a folder, I found on the wordpress codex. There are even installation instructions for installing into a subfolder: http://codex.wordpress.org/Installing_WordPress#In_a_Subdirectory

If I had known this would cause me so much trouble, I”d avoided it long ago.

I guess its just something like get_bloginfo(’wpurl’) instead of get_bloginfo(‘siteurl’) right?