Hi,
Integrating TP on WP works very well, except for one thing: IE.
I noticed that my WP blogs (latest WP version, different themes & plugins) were broken on IE8 (couldn't test on IE9) because of the TP include.
I don't know why, but that's a fact: even on a fresh WP install, with default theme, the include of the ssi_in.php file break the design on IE8.
For the moment, I fixed loading the file only for not-IE visitors...
If you can take a look on this
Thx !