git-gui problem with version number.

Hi, git-gui does not get along with the creativeness in git versioning:

git-gui
Error in startup script: expected version number but got "1.5.3.rc2.4.g726f9-dirty"
    while executing
"package vcompare $_git_version $vr"
    ("2" arm line 4)
    invoked from within
"switch [llength $args] {
        0 {
                return $_git_version
        }

        2 {
                set op [lindex $args 0]
                set vr [lindex $args 1]
                set cm [package vcompare $_git_ver..."
    (procedure "git-version" line 4)
    invoked from within
"git-version < 1.5"
    (file "/usr/local/bin/git-gui" line 1)