I often use HTML tags in my aLOG entries to change fonts or colors in my entry. Sometimes, I forget to close the tag. This causes the rest of the page of logs below it to inherit the property of the tag I left open. (Others have done this / use HTML tags / caused this error -- I say this only to emphasize that it's not just me; it's beside the point).

For example, search the log for my name, and the keyword "/Common/MatlabTools/." This returns several entries (to be sure I demonstrate them getting "infected" by my left-open <font face="courier"> tag). Scroll to entry 1507 (a comment to Jeff Garcia's entry 1506, 5 entries down), and see that all entries below it have their font changed.

EVEN MORE CURIOUS: The bug manifests itself differently on different platforms. On a workstation-like machine ( Ubuntu 10.04 LTS, running FireFox 3.6.24), the open tag affects rest of the page in it entirety. On my laptop (Mac OS X 10.7.2, FireFox 8.0.1) it only affects the headers and footers to the entry (Subsystem/Task, Author and Date, and Title; any attachment indicators), the bodies retain their formatting.

I usually catch this user error, because I run preview before I post, but sometimes it slips. 

Regardless, I think the log should be robust against this sort of user error.