Help in solving problems with the site on Joomla 1.5

Question

Joomla

Hello IT gurus!
Tell me what could be the problem:
1) Question marks are displayed next to the name of the author of the material.

2) Where to look for a problem with RSS on an error that is displayed when checking it for validity:
line 1, column 2: XML parsing error: :1:2: XML or text declaration not at start of entity.
Joomla version 1.5.25, YouMagazine template.
Website: http://sgvibor.ru
Hosting: infobox.
Thanks for any help and links on the topic.

Answer 1

See it •in the template or database for them.