Hi guys, I'm a long time threads user (since UBB Classic) and have never had this problem before. If it's relevant, I switched to my own VPS a month or so ago. I am currently using UBBT version 7.1b5 and I'd rather not go through an upgrade right now to fix this problem, which would be using a big shoe to squash a little bug.
Today I noticed that a subscribe link on my forum pointed to the wrong site (I let people subscribe via PayPal to help with hosting costs). I fixed it in the header.tpl file and uploaded it. The page still displayed with the old link.
I looked at the header.tpl file directly on the server, and it had the correct new code, but loading the page in my browser still showed the old version of the page with the wrong link.
As a test, I deleted the header.tpl file on the remote server to see if it was displaying the page from a cached version somewhere, and my postlist loaded without a header and no CSS formatting (as I would expect it to with the header.tpl file deleted.)
I uploaded the new version again, and then the postlist page displayed with CSS and header showing, but still displaying the old version of the code with the old link.
I discovered I'm having the same problem with altering a template on another threads site I run on my same VPS. No matter what changes I make, it still displays the old code unless I delete the template, then it displays as you'd expect with that template file missing. Re-uploading the new version of the template restores it to showing the page with the template's old version.
