Hi John,

Well... things are not so good after a night's sleep.

After the rebuild with compression off, I repeatedly switched compression on and off, restarted, cleared cache etc. over about three hours before I posted to the thread and not once did it fail to apply page settings with compression turned on. On my previous build it failed immediately.

However this morning I get up and it no longer works. So I turned compression off again and it's fine.. I hope I didn't send too many people on a goose chase with that one!

Not sure what to do now, but i'll stick with this 441 build as I'm now pretty sure that this will be sorted out in the end.

I was afraid that it wouldn't stick.  I had that problem with the blowery compression module on more than one occassion.  I would think I had the right exclusion in, only to find out a couple days later that items could not be added to my online store.  Not fun.

With the old code, it was finally fixed by specifying the exclusion as "ebresource.axd", all lower case and skipping the first "w".  This was because of a bug in the way the path was compared.  That info was all in the Http Compression project forum, but it looks like that forum was removed.  Too bad the knowledge info from that forum wasn't saved.

I recommeded that the core use a Regex comparison in this new compression module like I am doing in PageBlaster, but I guess they decided that was not the way to go.  With Regex you can specify just portions of the Url, or do some really cool things like making it exclude all Urls that do not have "tabid" in the Url unless the Url does not have a querystring at all (home page).