为什么vim缩进我的Perl代码？

我在Perl中有一个子程序,应该像这样缩进：

sub GetFiles 
{
    my $pwd = shift;
    my @input = @_;
    my @returned;

    my @DirectoryContent = &GetContentinformation(@input);

    foreach (@DirectoryContent) 
    {
        my %current = %{$_};

        if ($current{'info'} =~ /<DIR>/) 
        {
            my $RecurseDir = &GetRecurseDir($pwd,\%current);
            push(@returned,&GetFiles($RecurseDir,&GetDirectoryContents($RecurseDir)));
        }
        else 
        { 
            # clean up the data
            my $size = $current{'info'};
            # filesize will be in number of bytes
            # remove file separators
            #$size =~ s/,//g; 
            my $extension = &GetFileExtension($current{'name'});
            delete($current{'info'});
            $current{'size'} = $size;
            $current{'extension'} = $extension;
            # push(@returned,\%current);
        }
     }
     @returned;
}

但是当我按下子程序块的起始括号上的=％(是的,cindent打开)时,它会像下面那样缩进：

sub GetFiles 
{   
    my $pwd = shift;
    my @input = @_;
    my @returned;

    my @DirectoryContent = &GetContentinformation(@input);

    foreach (@DirectoryContent) 
    {
        my %current = %{$_};

        if ($current{'info'} =~ /<DIR>/) 
        {
            my $RecurseDir = &GetRecurseDir($pwd,\%current);
        push(@returned,&GetDirectoryContents($RecurseDir)));
    }
    else 
    { 
        # clean up the data
        my $size = $current{'info'};
        # filesize will be in number of bytes
        # remove file separators
        #$size =~ s/,//g; 
        my $extension = &GetFileExtension($current{'name'});
        delete($current{'info'});
        $current{'size'} = $size;
        $current{'extension'} = $extension;
        # push(@returned,\%current);
    }
}
@returned;
}

为什么这样做？我该如何解决？

编辑：应该注意我在Windows上使用gvim 7.3.

也许这是神奇的想法,但是…我曾经有过：

filetype plugin on
filetype indent on

在我的_vimrc中(在Windows XP上,自编译的gvim,各种版本),我会在Perl,LaTeX和HTML文件中得到各种有趣的缩进问题.

我现在有

filetype indent on 
filetype plugin on

而且一切似乎都是笨拙的.因人而异.

另外,我强烈推荐Andy Lester’s vim-perl.