Hi, we have version 6 of EPI and also using ImageVault. In Chrome things such as editing an existing image from ImageVault stopped working, I think. Not sure it ever worked. But my Chrome did upgrade to version 15 a day or so ago.
For example when you place the cursor / marker next to the image (from ImageVault) and you click the ImageVault icon the ImageVault popup screen should automatically open up that image. But it doesn't!
This works fine in Internet Explorer and also in Firefox!
Chrome support in EPiServer still has some glitches. And I'm not sure neither CMS 6 nor ImageVault officially support Chrome or have been verified to work. Nontheless, you should probably open up a ticket with meridium to alert them of this particular bug.