How to force gallery work with chomds 755?

[H_e_r_m_i_t]

So..  After moving to new hosting provider i have faced with very popular problem: on my new server gallery doesn't work with chmods 755. Here i found many, many topics with similar problems. And the only solution which i have found is to change chmods from 755 to 777. But it is less secure than 755! On what server (php?) settings depend gallery capacity for work with chmods 755? How to force gallery work with chomds 755?

P.s Sorry for my terrible English... 

[Nibbler]

Coppermine works fine on 755 as it is.

[H_e_r_m_i_t]

I receive error  message when uploading photos to albums/userpics with chmod 755. with 777 all works fine 

[Nibbler]

If apache runs as your user id, then you can use 755.
If apache runs as something else eg. 'apache' then you have to use 777.

Search on google for info on how permissions work.

[H_e_r_m_i_t]

Thank you!