[Plugin: Contact Form 7] Firefox and Captcha conflicts

Hi there,

Faced two issues with CF7.

—Issue 1 —
There is no validation with FF 9.
Error/Validation messages boxes did not pop out.
Ajax loader keeps spinning but nothing happens.
It works correctly only if captcha is deactivate.

Test with IE8 and it works correctly.

—Issue 2 —
How to reset the default CF7 stylesheet? and can the validation messages boxes and upload button be styled and re-positioned?

I’ve used up my means to search for relevant classes in the default stylesheet and write my own stylesheet but it seems that the default are ‘craved in stone’.

Additional info:
Using latest version of WordPress, Contact Form 7 and Captcha.
No other plugins are installed except the mentioned two.
Not using any themes.

Only modification done to the CF7 plugin are based on these two steps
http://contactform7.com/controlling-behavior-by-setting-constants/http://contactform7.com/loading-javascript-and-stylesheet-only-when-it-is-necessary/

—-
Your input and help is greatly appreciated.
Thanks!

http://wordpress.org/extend/plugins/contact-form-7/