A Prajñāpāramitā from the reign of Vigrahapāla III
Here is the very first attempt of trying to crack it/them:
ye dharmā [etc.] deyadharmo [']yaṃ pravaramahāyānayāyinaḥ paramopāsaka-bhoesataṣo(?) Hāsillasya(?) (I'm in trouble here) yad atra puṇyaṃ [etc.] mahārājādhirāja-parameśvara-paramasaugata-śrīNayapāladeva-pādānudhyāta-śrīmadVigrahapāladeva-pravardhamāna-kalyāṇavijayarājye samvat 15 phālguna-kṛṣṇa-dvitīyāyāṃ niṣpāditam iti || || śrī[ma]n-Nālandāvasthita-dharmabhāṇaka-Ānandena likhitam iti || ||
Well, one always likes to see Nālandā smiling at the reader from a Sanskrit manuscript. It's also good to know that dharmabhāṇakas sometimes did copy manuscripts. As for the rest, nothing really new. We already know that Nayapāla was Vigrahapāla (III)'s precursor on the throne, and we know that Vigrahapāla ruled for at least 15 years - actually, much beyond that: the last figure I've seen was 26 years. However, the rest is rather interesting:
āsīt sāttvikajāniko (hm...) guṇagaṇaiḥ prakhyātakīrtiḥ purā
nāmnā Boddharaṇaḥ samāhitayaśā sūnus tato [']bhūt priyaḥ|
yo 'sau nūtanakarmabhiḥ pratinavāṃ lokārthasaṃpādikāṃ
prajñāpāramitām akārayad imām Ūlūkanāmāhvayaḥ||
śrīmadGopāladevasya rājyasamvatsare 'ṣṭame|
niṣpādya saṃpratiṣṭhāpya prāptaṃ puṇyam anuttaram||
sādhu(?) yat tena puṇyena lokāḥ syur api bhāginaḥ|
prajñāpāramitopāyabodhimārgaparāyaṇāḥ || ||
So there was a man called Boddharaṇa, whose son, Ūlūka (rather unfortunate name nowadays), renovated (?) the manuscript during the reign of Gopāla, year 8, i.e. roughly 60 years later. We probably cannot see the restored pages (if this is what is talked about here), but it is rather strange that three generations later the scribe's hand is virtually the same as above.
UPDATE: note the two readings suggested by HI in the comments. I think the Tibetan scribble at the bottom says: dpal nā lan dar gnas pa'i chos smra [ba?] kun dga' zhes bya bas bris pa'o, a translation of the scribe identifying himself.
UPDATE 2 (Jun 19, 2011): This colophon has already been studied in Huntington & Huntington 1990 'Leaves from the Bodhi Tree' as item 58. Their readings differ somewhat.