Hi guys, i am looking for some help or information. Last weekend i helped a friend at a wedding shoot. After setting my white balance, two of my photographs came out completely blue. However after two images they reverted to the normal image colouration. After the church i set a new custom white balance at the reception and had no problems for the rest of the day however setting up my highkey backdrop in my studio with my twin strobes i went to set a custom white balance on my backdrop and all my images are now blue. However if i set my white balance to flash they are fine. This is the first time i have encountered any problems with setting a custom white balance. The problems has just occured over the last week.
Please help!

