Gerber export does not handle unicode characters
When a pcb file is ready to be exported to Gerber and when it is done the gerber file NAME.fab.gbr does not properly handle unicode characters in Author and Date fields. I found that author value is grabbed from operating system (my is Debian Linux) using pcb_author() function in src/misc.c file and processed into gerber output in src/print.c file. If the username contains some unicode character like üöäÜÄÖßČěščřžáýíéóň etc. there is block character placed into NAME.fab.gbr file instead. The same is in the Date field.