jiggered,

As you can see most of us don't have insomnia as a problem with Baclofen, and have not heard of insomnia as a side effect of the drug.

My interest was peaked and I was about to ask where you had read Baclofen can cause insomnia but decided to search a bit more.

http://www.drugs.com/baclofen.html

From the above link: Sleep Disorders (insomnia)

Still learning even after 25 years