This is a feature actually. It can made to open on one particular side or choose for itself wrt available space (by the programmer).
The textmate manual has a section 2.1.4 Positioning the Project Drawer, btw.
Soryu
On 13.01.2006, at 23:16, Jeffrey E. Forcier wrote:
That's an Apple window manager issue; with drawers like the file browser, it attempts to remember which side you had it on last, but if that side of the window is too close to the edge of the screen when reopened, it will automatically move the drawer to the side which has more room.