oh, ok, he has probably changed his installation, but not modified his post...

Sooo, must we come back to 1.0x version? Do u think guys it worths?

What kind of functionalities can I miss if I downgrade to 1.0x?

all new upcoming components and new features will appear only for Joomla 1.5

if u need urgently, downgrade, if u have time - search for options.
every well known developers is working on their modyfied components for 1.5 joomla now

:o

well, bless my soul.  I had this issue and was really frustrated trying to find the solution. 

In administrator panel > Mambots > Site Mambots > 

found the Simple Image Gallery in the list and !!  It wasn't published  :(

clicked "publish"  and got gallery!!!


egads. 

Fixed mine, was having issues with MXComment, took that away and working perfectly