Invalid value for a field not displayed on new issue

[bbach]

I'm trying to add a custom field "Revision Fixed" that is required to resolve an issue but not displayed when creating an issue. I added a regex ^[0-9]+$ and now I get an error when I try to create a new issue that there is a invalid value for the "Revision Fixed". Is this a bug? As a work around,I changed the regexp to "^[0-9]+$ |^$" but I think that will allow an issue to get resolved without a revision number. [mantis 1.1.2 - latest branch]-- Bud