[Q] Can No Longer Unlock... - HTC Rezound

Good ghod what a state I've managed to get myself into: I've been unlocking/re-locking my phone (ROM: OTA ICS, S-On, Unlocked, Rooted) for right at a year now, but, during the recent OTA update push, I managed to get it into a state where it will no longer unlock. My (long, sorry) story follows...
I started receiving the recent OTA push two or three weeks ago. The problem is that I'd renamed the HTClinkifydispacher apk and odex files, and added a couple of things to /system/app/build.prop so the update would fail. Why was this such an immediate problem? Because I use my phone for an alarm clock and would wake up on random days to see it booted to recovery---after having overslept. Grrr.
Being the impulsive guy that I am, rather than just ask here how to stop the f$*kin' update, I found and saved the OTA.zip file to my sdcard, fixed the two problems I was having, re-locked the bootloader, and booted to recovery. Next, I *thought* I picked the OTA zip file to install... but I was wrong.
For at least one reason (I wanted to install a kernel with tun.ko installed so I could use a VPN network connection), I had a copy of SebastianFM's 1.4 overclocked kernel zip on my sdcard and mistakenly picked *it* instead of the OTA zip (hey, the fonts are small in Amon Ra). Well, that install failed, and, when I saw what I'd done, I thought "uh oh," so I rebooted the phone fully to see if I'd done any damage. None was apparent. So I moved on, once again re-booting into recovery and (this time successfully) installing the OTA zip.
Woo-hoo!
I thought I was golden, but I was wrong: Using my original unlock code and an up-to-date copy of the Android SDK on my linux box, I tried to reflash the unlocktoken partition using the fastboot command. My cursor froze/still freezes at something like "[0kb downloaded]..." It's almost like I've lost permission to write to that partition in the bootloader.
After the first sixteen times of trying various re-flashes of the August OTA, I thought "Gee, maybe it's something to do with the firmware," and since doing something is almost always worse than doing nothing (yes, that's what I meant to say), I did the only thing I could do: I flashed the Global Update RUU zip from October that I got off of Android Police's site. It's a great ROM; unfortunately, I still cannot unlock my bootloader.
In anticipation of some possible questions, let me add that
(1) I've factory reset any number of times;
(2) When I did the flashes, I immediately re-flashed a second time to ensure that the flashes took;
(3) When I connect my USB cable, I see "Fastboot USB" light up in the fastboot section of HBOOT.
(4) When I issue any other fastboot command, such as "fastboot devices" or "fastboot get_identifier_token", I get responses from the phone.
(5) Even though I have my original Unlock_code.bin file from HTCdev, I went through the whole unlock process from that site (sent a new identifier token; got the Unlock_code.bin back; tried "fastboot flash unlocktoken Unlock_code.bin") on two other occasions. Interestingly, the identifier_tokens would vary, but any new Unlock_code.bin files have all been identical---if the md5sum hash can be trusted to distinguish them.
Can anyone out there in expert-land help me figure out how to re-unlock my bootloader?! !? Beer can be involved.
Many thanks for your patience and kind consideration...
cheers,
john

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Hey All,
So, I'd like to first say thanks to all of you who read and considered throwing in an opinion on how I might move forward with my little problem.
Secondly, I have some followup from HTC, which spawns a followup question. Please read on...
Since my OP, I have been in a back and forth with HTC about what I did to my phone that has left me unable to re-unlock it. Their answer, in a nutshell, was that I'd accepted the update while my phone had a 3rd-party recovery on it. Guilty as charged, I did; Amon Ra 3.15.
More specifically, they wrote: "If any portion of this check fails due to the stock recovery not being present, the update may load but the security sector will not authenticate. This may be blocking the re-unlock."
If you're like me, you'll note that there are a couple of "may"s in those two sentences that have left me wondering if they're just giving me a stock "I really don't know what the hell happened to your phone" answer.
So just to satisfy my curiosity, has anyone else out there ever had a problem flashing OTAs while having a 3rd-party recovery on their phones?
thanks again,
john

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There's a couple threads about the recent OTA, one in General and one in this section. People posted about their various experiences, you might find some useful info in those.
I wonder if you can s-off at this point and fix your issue? I don't know if you need to be unlocked to s-off, I know you end up locked, but if not, that would give you the freedom to flash what you want without needing to be "unlocked".

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feralicious said:
There's a couple threads about the recent OTA, one in General and one in this section. People posted about their various experiences, you might find some useful info in those.
Click to expand...
Click to collapse
Yes, I've looked through them and had no luck finding anything relevant to my case.
feralicious said:
I wonder if you can s-off at this point and fix your issue? I don't know if you need to be unlocked to s-off, I know you end up locked, but if not, that would give you the freedom to flash what you want without needing to be "unlocked".
Click to expand...
Click to collapse
The phone has to be unlocked to do the s-off thing.
thanks,
john

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Update: Problem Solved!
Hey All,
As the post title states, I finally did get this sorted out.
The solution? Borrowing a windows 7 computer, downloading the HTC device drivers, fastboot and adb, and then merely running the 'fastboot flash' thing. Like I'd done a thousand times already on my linux system. Sheesh.
Thanks to all who read or contributed to this thread...
cheers,
john