> I use the latest version of httrack, version
> "3.42-2-nossl".

3.4x has many problems, try 3.32
<http://forum.httrack.com/readmsg/17840/17833/index.html>

> I am trying to use a batch file which should
> None of my attemts limit the size of jpg-files; all
> jpegs are being downloaded regardless of their
> size.
> 
> Instead of 
> 	+*.jpg "-*.jpg[<10]"
> i also tried arguments like
> 	"+*.jpg[>10]"

> Then no jpg-files were downloaded.

I see you've already quoted percents (%%) in your batch file.
You also need to quote the angle brackets. Instead you provide a filename
starting with a dash. Try:
+*.jpg -*.jpg[^< 10]
That's a caret/angle.  Also note the space after the angle bracket.  It's
required for one direction but not the other.

+*.jpg -"*.jpg[< 10]" might also work.