I have this same problem and have had it since I purchased my computer. I have spent hours on the phone with Dell and finally erased the harddrive and reinstalled it to factory settings. Still this problem persist. It does not seem to happen as often but it is very frustrating when it seems as if some unknown entity has taken control of my computer. When it happens, I cannot position the mouse because it just jumps across the screen to another point before I can click. I may have had my computer for about 8 months now. I really wish Dell would replace this computer because this problem wont seem to go away. I think I have noticed that it seems to happen when my computer is upgrading. I decided to try a little troubleshooting tonight. Good luck and let me know if you find a solution.
Same problem here. 99% sure it's a hardware problem given:
1) I've upgraded to new BIOS
2) reinstalled ALPS driver
3) tried a Synaptics driver
4) exhibits the same problem under Mac OS X that I installed on my Dell under a dual boot config
Chatted with tech support and I have to send it in for a new trackpad (10-14 day turn around). Only solution I suppose.
Repair man was here and it's still not working right. I started having trouble with the fan and the trim around the monitor part of my lap top. Dell is sending me a new computer to replace this one and I will be sending this one back. I think the track issues can't be fixed but thats just my own thoughts on the issue.
We just have to face the sad fact that the touch pad on the Inspiron 1525 is poorly engineered. Mine doesn't work in anything close to a satisfactory manner. I will not be calling Dell re the problem, since they typically route you to some off-shore support center where the primary objective is to leave you so frustrated that you will simply go away and never come back. Actually, that's not fair. Their support is quite helpful if you can't find the on/off switch or you don't know where to connect the power cable. It's only when you want to go beyond the illustrations in the Quick Setup Guide that they have problems.
It is interesting to note that this is a problem which has been ongoing for more than a year) I purchased mine in august of 2008, and was too stupid to realize it was not me. I downloaded, reloaded, changed settings and contacted Dell. Unfortunately since it was out of warranty, no one would talk to me.
It is obviously a known problem, and there is no plan to change or correct it unless you complain enough within your warranty period. It surprises me that a good company would allow this to go on and on.
I will not purchase Dell again, recommend purchase or allow my company to continue their relationship with Dell.
PS: I have had to reposition the cursor 7 times during the typing of this message.
Got my computer back and Dell replaced my trackpad, and it's working fine, so clearly a hardware problem. One thing, when I first spoke to Dell support after they received my machine, they made some noise saying the trackpad wasn't covered under the limited warranty. I ended up asking for a manager in my first conversation with them. The second conversation, the CSR checked and my computer was being "magically" repaired under warranty. They fixed it, though.