Please attach a simple survey we can use for testing.

Some more debug information:
Regex checked on: http://regexpal.com/ and it works correctly.
Attachted an example of a survey suffering the problem.
Try to enter 22.0 as answer on question "frgripstrength1", it will round/fail when the survey is live. (Somehow it works correctly when the survey is not being live)

Hello,

In your survey you use a numerical input.
If you want a . in your answer : it's a text-input.

You can use text-short with 'numeric only' attribute. (i test it, and it work like you want)

If you want to use a numerical input, you have to accept 22 (without the dot) in your regexp.

:)

well I symp with the OP because if you are knitpicking the value entered is 2.0 and so the regex should validate it.
Of course it forces the user to enter '2.0' even if just '2' would be enough.
Still the regex should validate the mainly unaltered string, shouldn't it?

Question is if the effort is worth it, so the source where the 2.0 is straightened to 2 should be checked.

Shnoulle, would you like to have a look at it?

If i understand right,

You want regexp is OK for 2.0 in numerical type question ?

Numerical input : filter the input with [-0123456789.] (like js function) , test regexp and after floatval() the value to be integrated in sql.

I take it, but i remove urgent cause there are other possibility :)

yep

Fixed in 9256

Replace core/filter/sanitize_float function.

Oups using a PHP5.2 function

revert the commit and find a good solution.

It seems if :
First time we get to the question , if we put 2.0, it's OK
But if we put 2 and after 2.0 it's not working, right ?

Resolved in 9259.

With a goodest solution.

Released in 1.90 plus release.