So I ran into this problem as well and figured I'd join just to shed some light on this.
I figured out why the txt doesn't show up...I just don't know how to fix the problem.
It seems that for whatever reason..."regular font sizes" don't apply on the image your having a problem with.
I decided to open a separate image and put text on it (which worked fine) and then drag and drop the text to the image that I was having a problem with.
Turns out the text showed up just fine, but what I realized was in the image I dragged the text from, the font size said "15 point"...however once dragged into the old picture (with the problem) the font size registered as "1008 point".
Now since you can't manually make a font bigger than like 2500 point or something, I just made the text the size I wanted it in the unaffected picture and then dragged it to the affected picture (for reference, I wanted the text to be roughly 25 point, and once dragged to the affected picture it registered as around 4300 point.
So at least if thats what is happening to you there is a way (albeit pain in the butt) around it...although I'd like to know what could be done to fix this.
(And I already did the preferences thing although I doubt that was it anyway because it shouldn't only happen with one particular image)
But thanks for the help you guys did provide me!! (I found this site while googling to find an answer to my problem haha!!)
