I'm having a similar problem as this fella, but the fix seems odd.
The original problem was that, as downloaded, Tiga sent out no styles, and the whole page was straight text on the left margin. That's what I'm seeing on mine (click here for the site). The fix was to change "style.php" to "style.css" in the header file. This works, but...
Now, I'm no theme guru, but this means that, as I peruse the theme code, nobody refers to style.php anymore. Is this right? Now when I change things in Tigarator, nothing happens, as I would expect to see if style.php was pulling these new changes into the stylesheet. Changes made in the General section work (pages as menu bar and # of recent posts), but nothing else does; column widths, colors, fonts, nothing. The values are indeed being saved, because when I go back into the Tigarator, I see the changed values, but the blog hasn't changed. But with the change to "style.css", as one might expect, the styles in there rule, regardless of what the Tigarator values are. So, for now, so you can see the result, I've gone back to the as-downloaded version of header.php.
Incidentally, when I do the suggested executing of style.php in IE, I get (virtually) nothing.; an HTML head with one Meta tag and an empty body (when I do View Source; nothing on the page). When I use Firefox's web developer's toolbar and show the CSS's for the main blog page, Tiga's style.php contributes nothing.
I understand the benefits of having Tiga create a style.css for me and using it instead, but I can't get Tiga to do that.
I'm running Tiga 1.01 on WordPress 2.04. Any help would be appreciated.