I am having a similar issue. I had apparently installed ColorBox in a previous ZC version (and forgot all about it). When I installed 2.0.1 the files for ColorBox should not have been in there, only references in the DB as a configuration item. I do not remember installing colorbox after 2.0.1...idk...but 2.0.1 was working perfectly fine with multiple images. Then last week I installed Image Handler 5 and now when I have multiple images for a product everything disappears except for the 1st image...no product description, no attributes, no quantity box, no add to cart...nada...it has been a nightmare to say the least trying to figure it out...I tried running the sql uninstaller for ColorBox but that didn't work. Also uninstalled Image Handler 5 and that didn't work either. Products with only 1 image display normal, add a 2nd image and I get the blank product page, remove the additional image and the page comes back.

So I decided to just re-install 2.0.1 but every time I do it does not give me the "Upgrade" button option despite setting the configure.php files in both the includes and admin/includes folder. Re-tried it like 5 times today thinking I was doing something wrong. I tried upgrading to 2.1.0 to just get past the issue with 2.0.1 but DPU which I depend on for my site wouldn't work...so I tried POSM and POSM P/W and it apparently doesn't have the same functionality as DPU so I am back to square one.

If you find the fix for the partial white screen please let me know.