Hmmm... I am not sure what was going on over the weekend. On Saturday I was dealing with a broken washer and Sunday we were on a boat tour for my parent's 40th wedding anniversary.
A slow response or error messages like "database errors" and MYSQL errors are caused by our hosting company having problems. A debug warning usually means a Java error or something like that. That is usually caused by someone using an outdated version of Java.
A browser crash is the result of a problem on an individual user's computer. Nothing on this site should cause a browser to crash. I would start with clearing out your Internet browser cache.
If there is a specific page that always causes a problem, note the URL and report it to me.
As far as speed issues go, I'll have to investigate that further.