[thanhpham123]

Subforums are not listed.
The subforums not being listed will be fixed in 2.6.1.

A few more questions:

Using any caching plugins?
Using any SEO plugins that might be interacting with CSS files?
Using a right-to-left language?
Overriding any constants? (WP_CONTENT_DIR, WP_PLUGIN_DIR, WP_THEME_DIR, etc…)
Anything else about your WordPress installations you can share?

The only related change I can find, is: https://bbpress.trac.wordpress.org/ticket/3012

If you’re able to edit that file in bbPress directly, and revert it back, and test, that would be super helpful to confirm or disconfirm if that does it.

[Robin W]

sorry, is there a question here? – it appears to just be a series of pastes 🙂