I have uploaded a temporally bugfix. The playership icon should no longer go invisible. Looks like the custom icon is the issiue. I will try to make it work. For now, use this.
Temporary bugfix for 1.0 - missing playership icon #1
Fixes the bug present in Ultimate Freelancer 1.0 where the player ship icon on the nav map becomes invisible. The custom icon has been replaced by the default Freelancer icon.
Apply this fix the same way you would install the pack itself: replacing folders and files when asked.
If the problem consists, let me know. Details would be nice too (joined group, left group, relogged, etc.).