It looks like a bug got introduced recently in the Polymorph package.
The following code does not work:

text: aText icon: form

   ^ self new
       morph:    aText asMorph;
       icon: (AlphaImageMorph new form: form);
       yourself


#form: is not implemented in AlphaImageMorph. It looks like #image:
must be sent instead.

What do you think?

--
Damien Cassou
http://damiencassou.seasidehosting.st

"Success is the ability to go from one failure to another without
losing enthusiasm."
Winston Churchill