could you please try updating the theme to version 3.0, available from the “Downloads” tab of your ThemeForest account; in case the update does not remove the issue for you, please let me know, I will investigate it further!
I am looking into the code now, and have a suspicion what might be wrong; could you please tell me if you have any value set for the “Maximum content width” option in the “Page Elements” tab of the Theme Options panel, and if yes, then what is it. Thanks!
you’re absolutely right, I was able to replicate the bug, this is indeed my fault – thank you for bringing this one up! I’ve prepared as fix, which will be included into the upcoming 3.1 version update for Ikebana (due to become available this week); meanwhile, you can download this archive, unzip it, and upload the resulting file into the primary theme folder (/wp-content/themes/Ikebana/), replacing the existing file. Please let me know if it corrects the bug!