[EvilLS1]

pco,
Your server type or settings shouldn't make any difference. Anytime you're dealing with javascript you're bound to run into problems with some browsers. Anyway, I'm at work right now but when I get home tonight I'll install the latest version of Opera and see whats going on. If I can reproduce the problem I'll try to find a way to fix it and post it here.

PitchouneN64ngc,
You could put a checkbox option in the quick edit form so that the user can decide if he wants to subscribe or not. You'd still have to have it checked or unchecked by default for all users b/c in order to check the users preferences for subscriptions I believe you'd have to add a query to showthread.php and that wouldn't really be worth it. But if you want to add the checkbox just do this:

In the showthread_quickedit template find this:

	 <if condition="$bbuserinfo['signature'] != ''"><label for="cb_signature"><input type="checkbox" name="signature" value="1" id="cb_signature" tabindex="1" checked /><span class="smallfont">Signature</span></label></if>

Above it add this:

<input type="checkbox" name="emailupdate" value="1" checked /><span class="smallfont">Subscribe</span>