> When creating/updating entries in elog, excluding the main text field are 
> there any limits on the size of the other fields?

Yes, this is controlled by the variable NAME_LENGTH in elogd.c, which is
currently set to 1500 characters. You can try to increase this and recompile,
but at some point you will produce a stack overflow and elogd will crash. So
the current length is a compromise.

- Stefan