[Plugin: NextGEN Gallery] Image list problem with thumbnails

Hello,
For a beginner like myself, I am so happy I found your plugin! Extremely easy to use, just great stuff.

I have one small problem though. On my desktop computer I can see everything how it should be, absolutely no problems whatsoever.

But a friend of mine rang before and said she was using her laptop, but the image lists were all squished up. Clicking on an image, everything displays correctly however.

I checked it out on my laptop and I found I had the same problem.

Would you have any idea what I`ve done wrong?

Any advice is greatly appreciated.
Best regards,
REGillett

https://www.ads-software.com/extend/plugins/nextgen-gallery/