a code block should ALWAYS be monospace, but the style sheet defines sans-serif as standard fallback for people (like me) who do not have Courier or Courier New installed.the buggy style sheet wrote: .code {
font-family: Courier, 'Courier New', sans-serif; font-size: 11px; color: #006600;
background-color: #FAFAFA; border: #E2E5F1; border-style: solid;
border-left-width: 1px; border-top-width: 1px; border-right-width: 1px; border-bottom-width: 1px
}
please replace this 'sans-serif' with 'monospace'