* The first character in a line is not seen when the user types. Only when the second character was typed, the first one will only be shown then. (This affects only the old build. I guess this must be a GTK issue, or already fixed in the source tree.)
* Non-English keyboards may have problems in entering some special characters including the NOT sign and the OR operation. The user may need to change the keyboard layout to English to enter them.
The UTF8 characters (including "ä" from German) seem to be problematic when saving the .tle file. In the XML file the latin2 version of the character will be saved, and it cannot be displayed when loading the file later.