Captcha version is now 3.9.2 (not yet selectable on this form)
WordPress version is 3.7.1
I also use the S2Member plugin - version 131126
I'm still building a site on my localhost - not a pro developper.
On my Login form, the captcha input box is as wide as the name and password boxes, that is 100% of the login box. This make it unclear for user because the math expression is on 2 lines.
Looking the captcha input box with firebug, I can read style="... width:40px" (seems to come from captcha.php / lines 778, 789, 800). Yet, width IS 100% !
Being at the limit of my own skills, may you please help ? Thanks in advance !