It's worth noting that "unexplained" log entries are most definitely not the same thing as "problems". Developers turn on debugging outputs and forget (or don't bother) to turn them off, some developers think everyone will "obviously" know a certain log entry is just for information no matter how poorly worded, and English is not the 1st (or sometimes not even the 2nd) language for many developers, so the log entries may not be worded to reflect the developers' intent. I'm sure there are other caveats I've omitted.
The point is, even ominous-looking log entries can be purely informational, or just debugging outputs only useful to the original developer. Even somewhat meaningful log entries such as the infamous dcd_tainted crash, are really a "so what" because the service just restarts itself (and then crashes again, rinse, lather, repeat), which, while it is crappy programming on ASUS/Trend Micro's part, it doesn't affect router operation at all.