ISNUM, ISINT - incorrect behaviour

Hi All, I've found that in Web Datablade release 3.32.TC3 the functions ISNUM and ISINT process incorrectly empty strings and white spaces. According to release notes the bug number 85473 related to these functions was fixed in current release. But following example shows a bit strange result : execute function webexplode("<?MIVAR NAME=o DEFAULT=>$o<?/MIVAR><?MIVAR>$(IF,$(ISNUM,$o),T,F)<?/MIVAR>" ,"") The resulting html string should be "F" because variable "$o" has been initialized as an empty string but in this release we receive "T". I wonder is this bug or Informix decided to treat white spaces and empty strings as numbers. Thanks, Taras.