Block shows as different scale but inserts correctly

[martinowen32]

Hope someone can help me with this issue, so I'll try to be clear;

For years, I've had a pallette of 30 or so blocks

All insert fine at the correct scale and the 'preview' when you click a block is fine

Recently, 2 of these blocks appear much larger when clicked on the toolpallette but still insert at the correct scale (so the scale settings are ok).

Obviously this visual appearance is annoying with appearing to insert much larger, but only for 2 of my dynamic blocks

Can someone advise? If i redefine the block first, it's fine. But I don't want to have to do this every time I start a new drawing.

Thanks in advance.

[martinowen32]

Also both millimetres

[h_s_walker]

You've got me stumped then.

I can't think of any other settings which change