|I don't know about 2010, but Word 2007 docx files are essentially zip files.|
If you "open" it, using say 7Zip, you will see several sub-directories with xml type files.
Under the sub-dir called "word" there is another sub-dir called "media".
It appears that this is where screen shots, which have been inserted, are stored.
They are stored as .PNG file types.
You might be able to check and see if your pics are of the correct size.
If they are complete, then there may be some option you can tweek to
get them to display correctly.
Sorry can't be of more help.