Connection problems after waking from sleep????

I'm having a strange issue with my 2012 Macbook Pro running OSx v10.8. I take my computer with me between home and school, and I usually just put it to sleep during the commute. For the last few weeks, when I got to school and woke up my MBP, it wouldn't connect to the internet. It recognized the WiFi connection, but did not assign a valid IP address. It was only when I shut the computer down and rebooted it that I was able to connect. Strangely, when I got home, I had no problem connecting to my home network, even after waking up from sleep.
After a little while of this, it got worse. Now, even after re-starting, I am unable to connect at school. (WiFi icon shows exclamation point). This is also true for my home network.
Here's the kicker. When I log out of my default account and log into the guest account, I have no trouble either in school or at home. Waking from sleep is never a problem and I connect everywhere. However, as soon as I log back into my other account, I lose connectivity.
I have tried renewing my DHCP lease, or manually inputting an address, but neither of these have worked. I have resorted to using the guest account, and I want access to my old files again without having to switch back and forth.
If anyone has any input on this, it would be greatly appreciated!! Feel free to e-mail me at [email protected]
Thanks!

same issue here..
reset my network settings and reset phone a billion times already, same issue still occur. sometimes the phone will wake up with wifi and sometimes it will go to 3g, one time it went to GPRS, its just really bizarre. If i open safari it will ask if i want to join the network that i originally set up, but when i select the network it just says "unable to connect". If i just leave the phone be for a couple hours and wake it up again, it will rejoin the wifi network.
I use remote to control my music library, but if my phone goes to sleep, it won't reconnect again so it's basically useless.
BIZARRRRRE, driving me crazy..

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Wi-fi internet connection problem after waking from sleep

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Hello Diane:
Welcome to Apple discussions.
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No one responded to ti

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I would not be too quick to start swapping things out (esp. expensive things!) without letting the discussion flow. I have never seen an answer that worked except updates and not all do... see below.
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Hello Diane:
Welcome to Apple discussions.
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Reg...

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you've posted in the iPhone forum.

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Thanks to those wiser than I, who might read this note.

SOLUTION FOUND!
I've found a list of possible solutions here's the link:
http://osxdaily.com/2011/07/22/wifi-dropping-in-os-x-lion-fixes/
I solved my problem moving the Ethernet and WiFi adapters in the top of the list and Bluetooth at the end.
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Connection problems after waking from sleep????

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