Conky 2.0.0 own_window_argb_visual = true causes X Error

[vascowhite]

Output of conky -v

conky 2.0.0_pre compiled Wed Jul  2 18:53:50 BST 2014 for Linux 3.2.0-4-amd64 x86_64

Compiled in features:

System config file: /etc/conky/conky.conf
Package library path: /usr/local/lib/conky

 General:
  * math
  * hddtemp
  * portmon
  * IPv6
  * support for IBM/Lenovo notebooks
  * builtin default configuration
  * old configuration syntax
  * apcupsd
  * iostats
  * ncurses
  * Internationalization support
 X11:
  * Xdamage extension
  * Xft
  * ARGB visual
  * Own window

 Music detection:
  * MPD
  * MOC

 Default values:
  * Netdevice: eth0
  * Local configfile: $HOME/.conkyrc
  * Localedir: /usr/local/share/locale
  * Maximum netdevices: 64
  * Maximum text size: 16384
  * Size text buffer: 256

Conky config:-

conky.config = {
    alignment = 'top_right',
    --background = true,
    use_xft = true,
    font = 'LMMono10 Regular:size=10',
    xftalpha = 1,
    cpu_avg_samples = 2,
    default_color = 'ffffff',
    default_outline_color = 'white',
    default_shade_color = 'white',
    double_buffer = true,
    draw_borders = false,
    draw_graph_borders = true,
    draw_outline = false,
    draw_shades = false,
    gap_x = 12,
    gap_y = 35,
    minimum_height = 5,
    minimum_width = 5,
    net_avg_samples = 2,
    no_buffers = true,
    out_to_console = false,
    out_to_stderr = false,
    extra_newline = false,
    own_window = true,
    own_window_type = 'desktop',
    own_window_argb_visual = true,
    own_window_transparent = true,
    own_window_colour = 'ffffff',
    stippled_borders = 0,
    update_interval = 1.0,
    uppercase = false,
    use_spacer = 'none',
    show_graph_scale = false,
    show_graph_range = false
}

This set up causes the following output:-

X Error of failed request:  BadMatch (invalid parameter attributes)                                                  
  Major opcode of failed request:  62 (X_CopyArea)                                                                   
  Serial number of failed request:  1074                                                                             
  Current serial number in output stream:  1077

Commenting out the own_window_argb_visual = true, line causes conky to render properly, except that own_window_colour = 'ffffff', has no effect, it always shows with a black background.

How can I make the conky window transparent, or at least change its background colour?

[vascowhite]

After a conversation with Tucos on irc #conky it seems that the default settings for building conky 2.0.0_pre have BUILD_XDBE switched off. This was the cause of the X window error.

Building with BUILD_XDBE switched on stops the X error and allows own_window_colour to work. So the question remains:-

In order for transparency to work (on my system anyway) own_window_colour needs to switched off.