I just released VueScan 6.7.2 for Windows, Mac OS and Linux.
It can be downloaded from:
What's new in version 6.7.2
* Fixed problem with Windows polling the buttons on the
front of some scanners while VueScan is running.
VueScan now disables button polling while running and
restores the setting for button polling when it exits.
* Fixed problem with embedded ICC profiles in JPEG files