Hi,
1) Place your header image in this folder:
wp-content/themes/modxblog/images/
2) Update the CSS file, so that the #header points your image file
The default CSS is:
background: url(images/header-bg.png) no-repeat left top;
Replace this with
background: url(images/Banner_Mark_Travis_Final-2.jpg) no-repeat left top;
I had the same problem but had already set the structure to /%postname%/.
I had the “Robots” plugin and found that ticking “Disable the date-based archives” was causing all the problems.
I’ve had the same error, I spoke to my hosting company to increase the amount of memory they had allocated to my domain.
Not sure exactly what actions they took, but once they had increased the amount of memory available to PHP, this resolved the out of memory error.