Just tested this with the latest SVN. Seems to be problematic with bulia's latest changes.
When I select File->Import, no dialogue pops up until I click on the Inkscape window, as if it was already up, but somehow behind in window order. Then the images all import as blank.
If I overwrite the files from SVN with the zip from sas, the dialogue comes up immediately on top. It also doesn't use the PDF import dialogue, but ps2edit, which complains that "This application has failed to start because CORE_RL_Magick++_.dll was not found. Re-installing the application may fix this problem.", and yet it still imports the same images fine that came up blank with the current SVN versions.