When resizing large table images (with lots of columns) in the ER-Diagram in Toad you will find 5 dots in the lower right corner of the table image (showing that there are more than the displayed columns). When copying the table images from the ER-Diagram to the clipboard, these 5 dots (and with it the information that the table contains more than the visible columns) are missing.
WORKAROUND:
None
STATUS:
Waiting for a fix to be released in a future version of Toad for Oracle.