I have a very strange problem with the content preview function.
Case1
If the page has no preview-cache-file yet and I hit the preview tab, the changes are shown - but at the same time the changes are saved and online.
If I now hit the cancel button, the changes stay saved and will not be shown in the editor if I click on the page again to edit it.
Case2
If there is already a preview-cache-file for the page that I want to edit, the preview tab shows no changes at all.
Additional information
- CMSms version is 1.11.5
- Default modules + SEOTools2, FormBuilder and Captcha
- No php errors or even notices (PHP version 5.3.3)
- Debug mode looks fine
- Disabling the additionaly installed modules does not help
- Disabling page caching does not help
Hope somebody has a good idea

Best regards,
Olli