Deprecated: Function eregi() is deprecated in C:wampwwwxxxxmod_mj_xxx_menulegacy.php on line 55

This notice was a bother - the reason is that the function is deprecated in php 5.3.
Solution was to replace every 'eregi' function with 'explode'. You have to do this for all the legacy.php files in the installation - check mod_mj_pda_menu, mod_mj_iphone_menu, mod_mj_imode_menu and mod_mj_wap_menu folders inside your joomla_installation folder/modules folder.
It worked for me instantly!
PS: I hope the next version of MobileJoomla wont use the eregi function though.

Thank you. Fixed in git, will be released in 0.9.10.