There is no validation message for Mijoshop registration

1. Add a product >> Check out >> Register Account >> Add wrong format input(i.e email: "wrong email") >> No message inform that the input is wrong (i.e "E-Mail Address does not appear to be valid!")

2. Change the theme of Mijoshop from "decor" to "default" >> Working fine

http://www.joomlart.com/forums/showthread.php?105980-Form-validation-JA-Decor-theme-Mijoshop-not-working&p=456069#post456069