You're not the only one having issues. Something has happened with mine ever since the update too.
I can't even stack images that I was able to stack prior to the update, images that I KNOW are good.
I know they're good because they stacked before update with no issues.
I've attached a screen capture of the error and 2 of the images I'm trying to stack, shown with STF applied only.
I use the settings in BPP as set out by Warren in his PI videos. It has worked flawlessly for me until the update.
I'm running a Macbook Pro, 64bit, OSX 10.8.3 with PixInsight Standard Edition
Version 01.08.00.1015 Ripley (x64) RC7 installed.
I've been doing a little more investigating and it looks to me that the image I select as the reference image is not getting calibrated properly for some reason.
It's pretty hard to find matching star pairs with all the bad pixels in there!
![tongue :tongue:](http://pixinsight.com/forum/Smileys/default/tongue.gif)
Troy(?), try checking your images in the "calibrated" folder to see if your reference image is not being calibrated either.