The UTF-8 check has been there for several builds. It was an RTL bug that's been there for years, but just popped up when the code & data were shifted around a bit for a change in the Unicode+UTF-8 testing.
There's no reason for any TCMD user to download the help file from the FTP site. That's only there for people who *don't* have Take Command but want to browse the help. Existing TCMD users already have the help.
Sometimes there are other files of interest added to the FTP site, e.g., Plugin SDK, and it is faster (i.e., less effort on my part) to just use TCC to download "everything newer than last download" than to update everything manually. When files whose content has not changed have a newer timestamp, conforming to the Unix developers' misbegotten idea that making a copy of a book is a new book, I end up with wasted downloads.
Most of the time you'll be wasting your time downloading test builds, help files with one minor edit, and TCC/LE updates that aren't updates. (The TCC/LE users complain vociferously if I don't update the TCC/LE builds to the same as the Take Command builds, even though most of the time there aren't any changes in TCC/LE.) The SDK gets updated maybe twice a year, and only the PDF isn't going to be included in the latest Take Command build.
So you're going to be downloading 50Mb+ in order to get a tcmd.pdf that isn't perceptibly different from the last one, and which you're not going to print (or probably look at) anyway. Doesn't seem like a good use of your limited bandwidth!