To help you, I need a scenario that I can reproduce.
For the moment, I am not able to reproduce this problem and therefore can not help you.

Try give me a scenario (step by step) that can be reproduce or better, give me a video that show how to reproduce it.

I did on my other thread.
www.jms2win.com/en/forum/26-bugs-errors-...?limit=6&start=6
Screenshots of my exact setup for my template site.

Six months ago I tried to make your component work but GAVE UP. I felt my investment was wasted. I never followed up because I wanted to give some time for Joomla to stabalize since 1.6 was RC. After six months I still continue to receive the same type errors w/ Multi sites. Everything installs correctly and works up until I add another site. I am on a shared package 1and1 hosting. But I still continue to get errors with your Component, nothing else causes errors like this and I run several Joomla configurations since 2005.

After adding a slave site it installs correctly but when I try to Mange Site I get the following:
500 - An error has occurred.

JDatabase::getInstance: Could not connect to database
joomla.library:3 - Could not connect to database

Return to Control Panel

Warning: mysqli_close() [function.mysqli-close]: Couldn't fetch mysqli in /homepages/1/html/htdocs/com/libraries/joomla/database/database/mysqli.php on line 148

Templates Tools Layouts and Settings all respond.

Chech for Updates returns : Error connecting to the server: failed to open stream: no suitable wrapper could be found

I am running Joomla! 1.7.0 Stable [ Ember ] 19-Jul-2011 14:00 GMT
Joomla! Platform Version Joomla Platform 11.1 Stable+Modified [ Ember ] 01-Jun-2011 06:00 GMT PHP Version 5.2.17

Joomla Multi Sites version: 1.2.59 (Latest available: 1.2.58)
Patches definition version: 1.2.64 (Latest available: 1.2.63)

darrell wrote:
Running multisites Version 1.2.46 (Latest available: 1.2.46) and Patches definition Version 1.2.51 (Latest available: 1.2.51) on Joomla! 1.6.0 Stable [ Onward ] 10-Jan-2011 23:00 GMT. Everything is working with Multisite on the Master. Unix Symbolic Links: Allowed MySQL Version: 5.0.91-log Sharing supported

Check patches installation
Joomla Multi Sites version: 1.2.46 (Latest available: 1.2.45)
Patches definition version: 1.2.52 (Latest available: 1.2.51)
Files Status
ALL OK

Installed another site domain slave1 and it is running on Joomla! 1.6.0 Stable

Separate Database. Writing to database.

However I receive the following error on Master [Manage Sites].

slave id
Warning: mysqli_select_db() [function.mysqli-select-db]: Couldn't fetch mysqli in /homepages/htdocs/dotcom/libraries/joomla/database/database/mysqli.php on line 156

And at the bottom I see: Warning: mysqli_close() [function.mysqli-close]: Couldn't fetch mysqli in /homepages/htdocs/dotcom/libraries/joomla/database/database/mysqli.php on line 117

The slave site is functioning properly so far.