I have a couple of times, but not frequently... But i've peed on an obscene number of sticks, so I probably have about the same ratio as those that have gotten "just once" ;-)
By the way I have a pic of it on the third page of my photos.
YEP! Only once, looked like it had color but by the next day it was definitely grey. I've probably used more than 100, I was a bit obsessed, LOL...AND that's over 6 years of being sexually active. I'd taken a few, more than a few before DH and I ever met...had a few accidents with broken condoms and alcohol...not something I'm proud of...but I never had a positive that was fake until this year I have the one evap/false positive. The only other time I've ever had a positive was with my son and this baby. Unfortunately, I guess no test is perfect. But I'd still recommend FR or ClearBlue Digital, they're the only ones I I trust.
I have never gotten an evap line from FRER and ive taken a bunch
I actually had an evap/false positive from a FRER like three years ago. It had two lines that had color, so much so that I really thought I was pregnant. It showed up within the time frame and everything. However in the last year I've taken a bunch of FRER's when ttc and I never had this happen again. So maybe they changed their tests. The only tests that I have had consistant bad results were the blue dye tests. In January, I was tracking my bbt and was on cd50 and hadn't ovulated. I bought two different blue dye tests and hpt's from both of them gave me positives when there was no way I was pregnant.