Can we fix our Trac that doesn't lose new ticket text

[Edward Z. Yang]

Steps to reproduce:

1. Click "New Ticket"
2. Type some text into the box
3. Press "Back" in your browser
4. Press "Forward" in your browser

If you try this with an official Trac this doesn't happen, so either
this was fixed in a new version, or we have a plugin installed which
is causing this to happen.

Current version of Trac is 1.0.5, we're currently running 1.0.1

Thanks,
Edward