Comment 2 for bug 297701

In these files there are bad characters.

This is the very same node from both files, the first is imported with images embedded:

<text
       transform="matrix(0.864326,0,0,-1,549.463,99.497)"
       id="text29528"><tspan
         style="fill:#b93292;fill-opacity:1;fill-rule:nonzero;stroke:none;font-family:Wingdings;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:5.4373;writing-mode:lr;-inkscape-font-specification:Wingdings-Regular"
         x="0"
         y="0"
         id="tspan29530"></tspan></text>

This is same node imported with images linked:
<text
       transform="matrix(0.86432604,0,0,-1,549.463,99.497)"
       id="text29780"><tspan
         style="fill:#b93292;fill-opacity:1;fill-rule:nonzero;stroke:none;font-family:Wingdings;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:5.4373;writing-mode:lr;-inkscape-font-specification:Wingdings-Regular"
         x="0"
         y="0"
         id="tspan29782"></tspan></text>

This is known bug, but you helped it more near to the reason.
I will mark this bug as duplicate.