Need help fixing tuning problem w/ my guitar

I just bought an entry level ibanez (Gsa60) from a friend and i'm having problems tuning it. Whenever i tune one string it detunes the others strings. So if i tune the first string to E then go to the second string and tune it to B the first string will be out of tune. The last owner told me that it was the strings, because they are old. I know new strings don't stay in tune well although i've never heard of old strings doing this also. It seems more like the string is pulling on something to detune the others or something like that...please help.
thanks.

-guitar Vomiter

Are the strings old? (I think thats what you said) When strings get worn out or old, they become "dead". They loose their bright sounds and do not stay in tune. If this is the problem, restring your guitar and play it hard to work in the new strings. That should solve your problem.

I don't know the specific model you've mentioned , but if your bridge is a Floyd Rose , it's normal ... You should tune it (with a tuner if you got one) few times before they're all in tune , then you lock the strings from the nut.

I don't think that old strings affect each other this way, old strings just have less intonation along the frettboard , that's all .

I think it's the bridge , it might be the tremolo if your bridge is a tremolo type ... If not, I guess you should have a technician to check it out.

if you want to see a pic of the guitar:
http://www.musiciansfriend.com/srs7/sid=030123134609172195184080791634/g=guitar/search/bigpid/base_id/43306/
thanks
-guitar vomiter

I would also say its the tremolo.
Fix it, or replace it and get Gotoh locking tuners.
You tune them once, and they never get out of tune.

Ok dude, I think I know what the problem is.

You have what is known as a floating trem. This means that the bridge is kept in place by two forces. One is the force exerted by the springs in the cavity in the back of the guitar. The second balancing force is that exerted by your strings.

Consequently when you adjust the tension of one string (like tuning it) the other strings compensate and their relative tension (dictating their pitch) also changes.

So, undo any locking nuts and move any fine tuners to their middle position extinguish any smoking material and lock your seats in an upright position.

Then, tune your bottom E then your A then your D etc until your top E is at pitch. Then go back and do your bottom E again. Then re- tune to A, D, G etc. Once your top E is re- tuned (to pitch) start the process again. You will notice that the bottom E string is less out of tune than it was before. Now, repeat this process until, when you tune your top E, your bottom E is still in tune.

All floating trems have this problem and it is a huge pane in the behind.

I change my opinion to the bridge AND the strings. He said they were quite old, and I'm speaking from experience; old strings will go out of tune easily.

Okay thanks for the help i figured it out
when one string broke it took some of the tension off and all the strings went really badly out of tune because of the floating bridge (which i know now because of the help you guys gave me) so i just did what the moderator suggested and (after i got new strings) tuned it several times untill they where dead on pitch...thanks for the help
-guitar vomiter