I changed the category-template file so I could have a tag list instead of tag cloud when using the tag cloud widget. Everything seemed fine and I actually had to try several times to get it right so I was viewed the admin side several times after making the change.
I then deleted a post which I had "stickied" at the top. Not sure if you are supposed to "unsticky" first, but it was when I hit delete that I got a warning message first. I looked at the blog and it seemed fine so I didn't think any more about it.
Then when I went to log in again later I got the warning (beginning is the title and then this is the rest:
(output started at /home/hocke10/public_html/blog/wp-includes/category-template.php:1) in /home/hocke10/public_html/blog/wp-login.php on line 290 (repeated a second time with the line number changed to 302)
I looked for this warning, but none seemed to be using the current version of WordPress and they also mentioned having extra spaces at the end. I checked the file I changed and it did seem to have an extra line at the end even though I hadn't done anything to that part of the code; I deleted the space; reuploaded, but the problem is still the same.
As things stand, I cannot log into the admin.
I am also a newbie so if you know what is wrong, please be patient and spell out the steps for me.
Thanks.