Form suddenly doesn't display!

Hi there,

I created a form with conditional logic for a wedding RSVP and periodically tested that it was progressing as I expected, and everything was working well. All the fields worked as I expected and I was able to play around to my hearts content. Until a submitted a test entry. I got the email, but now when I navigate to the page that the form is on, I get a blank page. I can see that form is there on the page but is set to display none and that there's a JavaScript error relating to the processing of conditional logic:

Uncaught ReferenceError: gformIsNumeric is not defined
- gf_try_convert_floatconditional_logic.js:89
- gf_matches_operationconditional_logic.js:111
- gf_is_matchconditional_logic.js:79
- gf_get_field_actionconditional_logic.js:45
- gf_apply_field_ruleconditional_logic.js:22
- gf_apply_rules

But I have no idea what it means and how it suddenly got broken!

Can anyone tell me how I can fix this and why it might have suddenly stopped working?!

If it helps, I'm using the "Super Skeleton WP" theme, which actually recommended GravityForms in the documentation.

update:
It's definitely a problem with the conditional logic, if I take that all out, it works fine. It seems to be a problem with me using a "greater than" operator on a dropdown field which has "1", "2", "3", etc as values. I've tried also enable values and putting numbers in there but that makes no difference.

Cheers,

Tom

Actually, the form preview seems to be completely broken on my site. Nothing displays at all and looking at the HTML generated there's no sign of the form.

I worked out what the problem was with my form though, and also a workaround. I had a dropdown list of options with the text "1","2","3" etc. and was using conditional logic to only display certain fields when the dropdown was "greater than 1" or "greater than 2". I think there's a genuine bug there where it tries to cast the string value from the dropdown to a number for the purposes of evaluating the conditional logic. To get around this I changed the logic to from this form: "greater than 3" to this form: "is not 1 AND is not 2 AND is not 3". It's a tiny bit more hassle, but at least my from displays.

Just to confirm, same issue with a less than conditional rule in both the preview and published form

I am having the same problem

Conditional logic forms are not showing in the preview and are also not showing in the theme. I closed down the plug in and no change. Then I changed the theme to 2011 and it works.
I am also using Super Skeleton when I swap out the theme to check for a conflict everything works fine. However when using super skeleton (which recommends gravity forms) nothing shows.

I put up a test form at http://www.bodegacity.com/2012/06/07/que-pasa-events/

Please let me know what to do.

Kindest

Jack