Text Window Frame Border Problem

[PrettieAngel]

My project's being going rather slowly and I've only now upgraded it to Ren'Py 6.14.1, when it seems that the previous code I used for the background of the text window no longer works as I want it (previously used 6.11.2). I've tweaked the code to be as close as I can get it but rather than displaying the 6 pixels for the bottom border, a line seems to be showing up from the part of the image I didn't define as being on the border. I've included some images, since I'm not very good at explaining what I mean.
I've tried to look around a bit for the solution but I don't really know what this is caused by, so I hope somebody might be able to help me. Thanks.


EDIT: It seems I've been able to fix this by setting tile=True, though I would appreciate it if somebody could shed some light on why the previous code doesn't seem to work with the new version.

The code I'm using to customise the text window is as follows:

Code: Select all

    #########################################
    ## These settings let you customize the window containing the
    ## dialogue and narration, by replacing it with an image.

    ## The background of the window. In a Frame, the two numbers
    ## are the size of the left/right and top/bottom borders,
    ## respectively.

    style.window.background = Frame("frame2.png", 85, 180, 215, 6)

    ## Margin is space surrounding the window, where the background
    ## is not drawn.

    style.window.left_margin = 16
    style.window.right_margin = 16
    style.window.top_margin = 0
    style.window.bottom_margin = 16

    ## Padding is space inside the window, where the background is
    ## drawn.

    style.window.left_padding = 16
    style.window.right_padding = 16
    style.window.top_padding = 12
    style.window.bottom_padding = 12

    ## This is the minimum height of the window, including the margins
    ## and padding.

    style.window.yminimum = 176