@ Michael
Two options:
One:
Add the following to the timthumb-config.php
file found here:
../wp-content/plugins/connections/includes/libraries/timthumb/
Change the doc root accordingly:
define ( 'LOCAL_FILE_BASE_DIRECTORY', '/my/doc/root' );
Two:
Change the Medium Image dimensions on the Connections : Settings admin page under the Image Settings tab to be 100 x 130 or as desired.
Use the following shortcode:
[connections image_width='' image_height='']
Of you are using other shortcode option just add the width and height options. Setting these two values to empty will tell Connections to use the cached image that was created when the image was uploaded.
The downside of this method is that you will have to re-upload any images you have already uploaded in order for the new images settings to be applied.
Hope that helps!