Interesting! I missed that thread (and I did search).
When I contacted support recently about this they basically gave me the classic shared hosting brush off I get everywhere
along the lines of (I paraphrase)
"we can't see the problem, works for us, so it's not a problem bye"
(this was from level 2 support)
I emailed again with a link to that discussion, many thanks.
With any luck, Sherisa is still around or someone else will know the kernal problem that needs to be fixed.