One user, who has been having a problem with GPF's in a SSL based site (after a random, but large, number of page views) has reported that the error went away when upgrading Clarion from 9056 to 9058. The test involved running 12 to 15 clients against a single server, with a page on a 2 second timer. In other words generating about 5 to 10 page views per second. The same test reported no problems under either build for a non-secure version of the site.
The database was TPS.
One data-point does not a trend make, but I thought I'd mention it here because it clearly shows some importance to the 9058 build. If you are having a problem then 9058 might be a good build to use. (9058 is also the preferred build for MsSql users
for SQL related issues.)
Cheers
Bruce