Almost none. Since The Tilery is a simple application, it usually doesn窶冲 interfere with system extensions (INITs) or other applications. There are just a couple of exceptions.
Extensions and Memory
Some extensions (not many) like to borrow memory from running applications. If you use such extensions, you may have to give The Tilery more memory so that the extensions can use it.
Password Protection
Some screen-savers and security programs try to protect your Mac by refusing to allow any other applications to come forward until you type a password. Unfortunately, these programs are not really very secure. With some of them, you can use a hotspot or hot key to bring The Tilery forward anyway, almost completely defeating the 窶徘rotection.窶
The Tilery makes an effort to comply with such programs. AfterDark, Dark Side of the Mac, and some other screen savers have a way of advising other programs that password protection is in effect. The Tilery honors this advisory. It is safe to use The Tilery with these screen savers and with any other program which posts the same advisory.
For the technically inclined: the advisory is Gestalt selector 窶牢AVR窶, bit 4: set for password protection on, clear for off. Find a copy of 窶彜creenSaverGestalt.h窶: the selector is named gestaltScreenSaverAttr and the bit is named gestaltSaverPasswordMode. If you are responsible for an application which attempts to lock out other programs via password protection, you should probably be using this mechanism.
