I get this [ ] error when I install all modules by select all and install. This error doesn't appear when I install each module separately. OS is ubuntu and webserver is nginx.

Can't reproduce this on my end.

 your OS and webserver ?

What happens if you try it again? Perhaps you hit a limit in PHP or something when it tried to compile the languages. Also, does compiling from the forum manager work?

I repeated the process by uninstalling than installing all modules again. It didn't work. Then I recompiled lang it didn't work. At last they way you suggested to recompile from forum manager. It did the trick :) Thanks 

My guess is when doing them all at once, your hitting a limit on number of database connections. MySql settings for number of connections may be to low.

 
No. That is a server setting. Must be configured in the servers my.cnf config file. Unless you have a dedicated server, you will not be able to change that. If your on shared hosting, then the host is most likely limiting resources. A common practice for shared hosting and why those that use it have far more problems running dolphin.

LOL. Looks like you deleted the last post i just replied to.

 I thought its not related to dolphin so i deleted it. i changed the max_connections to 10000 from 100 in my.cnf but after a fresh install i get the same error. Might be some thing to do with php?

First, may want to tone the max_connections down a bit. Second, what's the value for PHP's max_execution_time and memory_limit?

max_execution_time = 1200

memory_limit  = 250M

and max_connections down to 1000 :)

one thing i forgot to mention if i click install all modules i end up on

One funny thing i found out if i recompile lang from forum manager to fix the error, i end up with 2 "customize site layout"  sticks in the member menu. I am gona install all modules except the "site customizer" and will see if that is causing the trouble.

http://www.boonex.com/trac/dolphin/ticket/3586