Do you have a single-testimonial.php in your template? The output would be handled by that. It appears you may just be using the_post_thumbnail() without a size attribute passed to it and because of that it’s showing the large version of the image instead of the thumbnail like it should be.  The default image size for thumbnails controlled by the ‘Gravatar Size’ setting is “tbtestimonial_thumbnail” but you can use any image size you have registered with add_image_size()

Hope that helps,
Travis

Hi Travis, thanks for replying to my message!

I don’t see single-testimonial.php anywhere in my templates files.

After reading your reply, I think I need to explain my problem in more detail.

For example:

First testimonial on /testimonials/ page uses http://www.kettlebellsdvd.com/wp-content/uploads/2012/02/alexs-fight-118.gif as a source file fore gravitar.

Yet on individual testimonial page /testimonial/testimonialname/ plugin uses http://www.kettlebellsdvd.com/wp-content/uploads/2012/02/alexs-fight-118-150×150.gif as a source file fore gravitar. Needless to say that at my desired full-page width the outcome image looks blurry to say the least.

I don’t know where the -150×150.gif version came from.

So ideally I want these two switch their source files: I want to show small 150px wide thumbnails (like http://www.kettlebellsdvd.com/wp-content/uploads/2012/02/alexs-fight-118-150×150.gif) on the /testimonials/ page, and I want to show a large full-sized (http://www.kettlebellsdvd.com/wp-content/uploads/2012/02/alexs-fight-118.gif) image on single testimonial page /testimonial/testimonialname/.

If there is only a solution to use large full-sized (http://www.kettlebellsdvd.com/wp-content/uploads/2012/02/alexs-fight-118.gif) image on single testimonial page /testimonial/testimonialname/ that will do too.

Thanks in advance, Alexander.

I end up creating testimonial.php and it took care of the problem! Thx