I was recently surprised to see that my wordpress install folders have swelled up in size like anything. I have 3 installs of WP and I noticed that in the root of each install there were dump files with a name pattern "core.*" and with sizes to the tune of 12MB each.
I asked my host and he said WP often generates such files and advised deleting them. I have never seen such a thing happening before WP 2.5.1. Does WP really generates these files or is it a bug?
Example from one install:
core.6845 12 MB 0600
core.6964 14 MB 0600
The File Type is shown as: ELF 32-bit LSB core file Intel 80386, version 1 (SYSV), SVR4-style, from 'php'