Module development and code questions

I'm going crazy again. When I change the theme using e.g.:

$GLOBALS['custom_theme'] = 'whatever';

... I get the new theme I desire... but I lose all page blocks (both right and left). I can't understand what's going on here.

Hi All

I am a drupal newbie learning fast, and am also new to MySql, having previously used Oracle. I have installed the dba module to help with looking after the database but when I click 'view' or 'check' to show the rows in a table I get the following error:

Fatal error: Cannot use object of type stdClass as array in D:\www\drupal\includes\theme.inc on line 652

For 'view', this only happens when there is content in the rows. If a table has 0 rows a page is returned

I have tried different themes but this has no effect

I am developing module that uses nodeapi to add two additional fields to nodes. How can i include these two new fields in the rss feed for the node?

Thanks

I have know idea how to do this, but was checking out this script, http://cit.ucsf.edu/embedmedia/step1.php and thought it could be something cool to include in Drupal. Could be a good interface to help users display media.

I'm developing a module on top of the organic groups module which already defines the 'og' node type. I want three more node types: og-pages, og-news and og-events. I was using flexinode for these at first, but I need to have a 'ranking order' field for each node type which I can easily access in a page block so as to order the node listings their accordingly... flexinode doesn't seem to make such things easy. There are also a few other things lacking about flexinode, so I thought I'd define the nodes myself.

I really like the way of inputting math symbols used in www.wikipeida.org (or in their Mediawiki). Is there any way to port that kind of math inputting filter into Drupal? Thanks a lot!