I recently modified a small program of mine and needed to add a dialog box to the RC file.
The original RC file already contained the data for one dialog box and had been prepared with the old RS32 program. That dialog box was working fine at that time.
However, not being able to use the RS32, I turned to ResEd to add the second dialog box to the RC file. When I assembled and linked the modified program, the first dialog box didn't work. I thought at first that I may inadvertantly have modified some code for it but wasted my time. I eventually compared the RC file with the unaltered RC file from the past and found that RedEd had changed the data for that first dialog box even though I had not made any change to it myself!!!

:(
My program is now working fine after copying the old wording for that first dialog box over whatever RedEd had inserted.