http error 500 on generating invoice for 3.3.1

i’m having issues generating invoices with 3.3.1. everything i click on “generate” i will get an error 500.

Previously on 3.3.0 and before I was able to click back, refresh the page and i will see the file generated, but not with 3.3.1

here are my server info:

linux kernel 2.6.18-408.el5.lve0.8.61.1 (x86_64)
php 5.3.20
mysql 5.1.66-cli
apache 2.2.23

are there any other info required? i really do need help as i can’t generate any invoices now.

thanks.

Take a look into you apache error log file, you should get more information about root of error.
This may be a timeout too low into php config file or a memory size for php too low.